Select the Question That Can Be Answered Through Experimentation

Select the question that can be answered through experimentation.

A) Do adults in the western United States consume 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 $65.00 worth of groceries a week?
E) Both a and c.