In Single Case Experiments, It Is Difficult to Decide Whether

Multiple Choice

In single case experiments, it is difficult to decide whether a given baseline is stable because

A) different dependent variables can exhibit different levels of natural variability.
B) a given dependent variable might differ in variability across settings.
C) if a research setting is highly reactive, an initially unstable baseline might "smooth out" over time as the participant adjusts to the setting.
D) of all of these factors.