Corbin, One of Your Students, Is Having Problems with Conservation

Corbin, one of your students, is having problems with conservation. Which of the following questions would Corbin have trouble answering correctly?

A) If I cut one 12-inch cherry pie into 12 pieces and another 12-inch cherry pie into 8 pieces, which 12-inch cherry pie is larger?
B) How are an apple and a blueberry alike?
C) 6 + 4 = 10, so does 10 - 4 = 6?
D) If you have 8 red apples and 2 green apples, then do you have more red apples or more green apples?