26. One reason that teens tend to be especially susceptible to fatigue is that: A. It's harder to deplete their supply of energy
B. Their circadian rhythms are highly erratic
C. They are less aware of how fatigue affects them
D. They have trouble sleeping deeply

Suppose that sociologists and cultural anthropologists are tying to measure the amount of child abuse for cross cultural comparison. they run into disagreement over whether spanking a child is abuse or discipline. what problem are they encountering in their research? a. reliability of the definition of abuse. b. validity of the definition of abuse. c. occam's razor about the definition of abuse. d. none of these.