18.A pilot study examining weight bearing exercise and bone density detects an effect size of 0.8. You are planning the next study and know this means:

a. If you have a small sample you will overestimate the effect

b. If you enroll a large sample you may be spending more than you need to

c. If you have a small sample you will not have enough power to detect this effect size

d. You will find a clinically significant effect