Context: The passage below describes an experiment. Read the passage and then follow the instructions below.

Diane planted 20 radish plants in a greenhouse, putting each plant in its own pot. She placed ten of the pots under bright light and the other ten pots under dim light. Diane watered all the plants twice a day. After two months, she pulled the radish plants from the ground, threw away the leafy green tops, and measured the sizes of the radishes. She compared the sizes of the radishes grown under bright light to the sizes of the radishes grown under dim light.
Figure: a radish plant in soil.
Identify the question that Diane's experiment can best answer.
A. Do radishes grown under bright light get bigger than radishes grown under dim light?
B. Do radish plants grown under bright light have more leaves than radish plants grown under dim light?
Choose the right answer from the options and respond with its letter.
Answer: A