Which of the following is NOT true:

W) long-term variation in Earth's insolation is partially caused by precession

X) there has yet to be any scientifically well-documented case of a human whose immune system has eradicated HIV from their body

Y) Candida albicans is a common fungal infective agent in humans

Z) most scientific evidence supports the belief that C3 plants evolved from C4 plants
Z) MOST SCIENTIFIC EVIDENCE SUPPORTS THE BELEF THAT C3 PLANTS EVOLVED FROM C4 PLANTS