Read the following passage and questions, then choose the right answer from options, the answer should be one of A, B, C, D.

<passage>:
Kick Me Not long ago, out of curiosity, I picked up some exercise videos by Billy Blanks, the king of Tae-Bo. What a flop. The sets were cheesy, the music was awful 1980s synth-pop, and despite their martial-arts pretensions, the routines felt more like aerobics in disguise than like kung fu. But after flailing away in my living room for a few nights, my interest was piqued, and I decided to find out more about the real thing. Which martial art teaches good self-defense tactics? Which one would give me a good aerobic workout? How daunting would it be to jump into a class as a complete beginner? And would I get pummeled by the other students? To find out, I tried a handful of karate, tae kwon do, aikido, jujitsu, and kung fu classes in the Seattle area. I scored each one in several areas: how intimidating the class would be to a novice how much the exercises worked my muscles how much of an I got and, of course, its value in self-defense. All ratings are on a scale of one to five, with five being the hardest, most intimidating, or most valuable. To experts, this will look like a hopelessly biased and superficial inquiry. It is. But to beginners, it is one step toward figuring out which martial art might be right for you. Do you want a chance to kick the stuffing out of someone? Take tae kwon do. Do you want to improve your sense of balance? Take karate. Do you want to know what to do if someone tries to choke you? Take jujitsu. Just remember that if you're jumped by a mugger, the only thing Tae-Bo will be good for is making your attacker collapse into uncontrollable fits of laughter. Kung Fu Reputation: 1960s martial arts movies In the all-levels group I observed at Seven Star Women's Kung Fu, there were a dozen or so women dressed completely in black. (Most classes I took were co-ed.) The school wouldn't let me take the class--I could only watch--but that was better than Temple Kung Fu, which made me sit for an interview before they'd even reveal any information on their classes. There seemed to be an active screening process to keep out those with only a casual interest. and the lower body, from the kicking. It was not extreme, and nobody seemed exhausted. After the strength work and partner work, the class broke into a few groups (according to skill level) and repeated choreographed routines called "kata ," which involve a series of punches, kicks, and blocks with an imaginary foe. The class had broken into a light sweat, but was not gasping for air. Coordination and Balance:                 4 The moves were neat to look at, but they did not seem practical. And without sparring practice, it would be difficult to apply the drills in real life. Overall: Kicking, punching, and an aura of mystery. Tae Kwon Do Reputation: World's most popular martial art, new Olympic sport lots of kicking there was laughing, joking, and none of the aloofness or self-importance of the kung fu class. This rating is a little misleading. The lower-body strength workout was fantastic--my legs and hips were sore for days--but there was almost no strength training for the upper body. We used our arms only for balance and blocking kicks. At the end of class came a session of sparring (which I, alas, was not allowed to participate in). The students strapped on protective chest pads and helmets and began kicking the stuffing out of each other. Tae kwon do emphasizes sparring and gets students accustomed to dealing with an assault. Overall: More a sport than an art will make short work of flabby legs. Karate We started with sit-ups and push-ups, which were the most demanding parts of the class. The kicking and punching made for decent exercise, but I wasn't aching the next day. The drills (lots of punches, blocking, and kicking) provided some aerobic workout, but were not particularly intense. no full-force contact between students. Overall: Kicks and punches galore, with a dash of moral and spiritual teaching about self-discipline and obedience. Aikido Despite its reputation, aikido is decidedly nonaggressive--it's about deflecting punches and immobilizing your attacker--and there was a mellow, pleasantly upbeat atmosphere to the class. Strength Workout: 3 No sit-ups or push-ups, but pulling and yanking on other people looked like it would build muscle, and the rolls worked on your abs. There was little aerobic work, save for the rolling on the mats (which may explain Seagal's ever-increasing flabbiness). Learning how to neutralize a threat was the main goal of the class. Overall: You don't get to land any punches and it's noncompetitive, but you'll learn how to knock people over. Tai Chi Reputation: What those slow-moving people in the park are doing Aerobic Workout: 0 Degree of Contact: 0 I learned how to repulse a monkey, not a person. Overall: A yawner, slightly embarrassing to perform, but I'm sure if done correctly it brings high-quality inner peace. Brazilian Jujitsu Reputation: For hurting people. Intimidation Factor: 5 Although the listing in the phone book advertised the "Brazilian Jiu Jitsu Academy," the sign on the door said "Northwest Fight Club." Inside the club, huge holes had been punched in the walls--some back-size, some fist-size. Huge letters painted on the wall said "TRAIN &amp FIGHT HARD." The instructor, a handsome young Brazilian man, had a long scar curling out from the left side of his mouth and a fresh-looking purple one by his left eye. When I asked to try the class, he shrugged and lent me a gi (the white outfit most martial artists wear), on the back of which was a drawing of massive snarling pit bull and the slogan "PIT PULLING PURE POWER." I wondered if I was going to need an ambulance to take me home. Strength Workout: 5 The next day every inch of my body was sore--my stomach, arms, legs, feet, and neck. For Olympians only. This ranks as one of the hardest and most complete workouts I've ever had. After some stretching, we launched directly into hundreds of lightning-fast sit-ups, crunches, push-ups, leg lifts, and scissor kicks. I was quickly panting and my face turned a deep fuchsia. We did forward and backward rolls, learned to escape from various holds, and executed the sort of belly-crawl that marines always seem to be doing in movies about basic training. After an hour and a half I felt close to death, but there was still another hour to go. After drills, the instructor paired me with Isabella for partner work. He demonstrated how to get Isabella into choke-holds and leg-locks, as well as how to escape from them. We practiced on each other. It was a little unnerving to be choking Isabella so soon after meeting her, but she didn't seem to mind. I learned how to go from sitting on top of her with a knee in her stomach to a position where her arm was between my legs and I could break it over my stomach. The end of the class was spent with full-on grappling. Getting your face mashed into someone's armpit was de rigueur . Self-Defense Value: 5 Jujitsu's few-holds-barred grappling is far more effective when push comes to shove (and worse) than standing arts such as karate. Overall: Lots of grappling, throwing, and choking. Pragmatic, not pretty. High badass quotient.

<question>:
Which class was the least intense?

<options>:
A Kung Fu
B Tai Chi
C Aikido
D Brazilian Jujitsu

<answer>:

B