Cat and Renee are looking to see if RAMP schools have better academic performance outcomes than schools without the RAMP designation. They ran a t-test and found that there was no difference between the two types of schools (RAMP & non-RAMP), t(8) = 2.15, ns. If they only had 10 schools, what threat to validity should they be concerned with?

a. violating statistical assumptions

b. fishing

c. low statistical power

d. attrition or mortality