Which of the following questions is a scientific question?

A. Do yellow apples taste better than red apples?

B. Which contains higher levels of vitamin B- oranges or spinach?

C. Does asparagus taste better than brussels sprouts?

D. Are lentils a more enjoyable source of fiber than black beans?

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?