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

Ten groups of chemistry students combined three solutions that, when mixed, chemically reacted and turned blue. Before mixing, five groups of students heated the solutions to 25°C, and five other groups heated the solutions to 50°C. The students recorded how many seconds it took for the mixtures to turn blue. Then, the groups shared their results, and the class compared the time it took for the mixtures to turn blue at 25°C and at 50°C.
Figure: a blue solution in a beaker.
Identify the question that the students' experiment can best answer.
A. Does the mixture of solutions release more gas when they are mixed at 25°C compared to 50°C?
B. Does the mixture's color change faster when the solutions are mixed at 25°C or 50°C?
Determine the correct option from the provided choices and reply with its corresponding letter.

B