______ period of development is a time in which a particular development must occur if it is to occur at all

The causal impact of TV on violence is in the neighborhood of

(a) 1% (b) 10% (c) 47% (d) 72% (e) 90%

The principle of ________suggests we are more likely to comply to a request made by someone in charge

a. similarity b. liking c. authority d. commitment