Paloma Has Conducted a Study on Whether Religious Attendance Is

Paloma has conducted a study on whether religious attendance is related to attitudes about legal gun control,using a nationally representative sample of 145 adults.She is surprised to find no association between the two variables.If there is actually a small correlation between religious attendance and gun control attitudes,one factor that is likely to have affected Paloma's findings is that

A) she only included adults in her sample instead of also including children and teens.
B) her sample size was not large enough to detect the difference by religious attendance.
C) religious attendance is too rare these days to be detected by national samples.
D) there is reciprocal causality that hides the basic association between the two variables.