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

Darell put one two-inch steel nail into each of six test tubes. He added water to three of the test tubes and vinegar to the other three. In each test tube, he completely covered the nail with the same volume of liquid. Darell checked the nails for rust at the same time every day. He recorded how many days it took each nail to become completely covered in rust. Then, he compared the number of days it took nails to rust in water to the number of days it took nails to rust in vinegar.
Figure: a new steel nail on a pile of rusty nails.
Identify the question that Darell's experiment can best answer.
A. Do steel nails rust in fewer days when submerged in a large volume of liquid compared to a small volume?
B. Do steel nails take fewer days to rust in water compared to vinegar?
From the given choices, pick the correct answer and respond by indicating the letter of the correct option.

B