A piano teacher is interested in knowing how many of her students plan to take time off from lessons during the summer months. She surveys each student on Monday and determines that about 50% of her students plan to take time off. She then repeats her study with her students on Tuesday, Wednesday, Thursday, and Friday. All surveys yield the same results. What generalization can the piano teacher make?

A.
About half of her students plan to take time off this summer.
B.
There is not enough information to generalize the survey results.
C.
The sample is biased; therefore, a generalization cannot be made regarding how many of her students plan to take time off this summer.
D.
Most of her students plan to take time off this summer.