Question

Which of the following questions is most testable through a scientific experimentation

A. which gelatin takes longer to set: gelatin with a fruit or gelatin without fruit
B. which fruit looks more attractive in gelatin: bananas or apples ?
C. which taste better: gelatin with fruit or gelatin without fruit?
D. which fruit do more people buy in one year: bananas or apples ?

Answer 1

Question A is more testable through a scientific experiment because you have a specific thing you are trying to find out, "which gelatin takes longer to set".