Answer:
For which of these questions could a testable hypothesis be developed? Check all that apply.
Does a flu shot hurt worse than a pneumonia shot?
x. Will breeding a red rose with a white rose make a pink rose?
Are pecans better tasting than walnuts?
x. Will practice help improve your reaction time?
x. Whose pulse rate increases more after running up and down a flight of stairs, that of an adult or child?
Explanation: B, D, and E. I just got it right