Select the question that can be answered through experiments.
A) Do adults in the western US consumer more 100% fruit drinks than those in the Northeast?
B) Will one brand name produce higher level-of-satisfaction reports than another brand name?
C) Do consumers purchase more chicken per capita on a retail weight basis now than they did two years ago?
D) Does the average two-person household purchase more than $65 worth of groceries a week?
E) A and C.