Dr. Sharma undertook an experiment where she made one group of students do breathing exercises for 10 minutes and another group was not given any special treatment. Next, both the groups were given a set of 10 problems to solve. She compared how quickly the two groups solved the set of problems. What was the dependent variable in this experiment?

Options

A. The time spent in the breathing exercises.
B. The age of the students.
C. The breathing exercises
D. The time it took to complete the set of problems.

Answer

D