Sentence 1: Mary tried to make the perfect batch of peanut butter cookies. 
 Sentence 3: The cookies just never turned out like she wanted 
 Sentence 4:  Glenda told her to adjust the oven temperature 
 Sentence 5:  That did the trick! 
 Option 1: She was adding too much sugar. 
 Option 2: She tried every combination she could think of.