Afruit bowl contains 3 apples, 4 pears, and 4 oranges. kayla selects 2 fruits at random without replacement. what is the probability that she selects an apple, then an orange?

Pick 1: 3 apples out of 11 pieces of fruit → 3/11
Pick 2: 4 oranges out of 10 pieces of fruit → 4/10 = 2/5

Pick 1 AND Pick 2
  3/11    x      2/5      =  6/55

Results and Discussion are definitely very relevant for examining an observational study - they contain the core of the study, so they will definitely be considered when evaluated.
So we choose between "Bias" and "Introduction".

I think that the correct answer is "Introduction" -as it doesn't include any new information about the study, and only summarizes previous work.