The two-party system gives voters a clear decision to make, and voters always have an easy time choosing between the two parties

A disadvantage of holding a variable constant is that

A) it reduces generalizability by reducing internal validity. B) it attenuates reliability. C) it attenuates correlations. D) it reduces generalizability by reducing external validity.

When did television become more prevalent in American households?

a. 1940s b. 1950s c. 1960s d. 1970s