You Are Likely to Reinforce (By Answering Pleasantly and with Interest)an

Multiple Choice

You are likely to reinforce (by answering pleasantly and with interest) an acquaintance who telephones you if such calls occur at a reasonably low rate, but not if they occur at such a high rate that you feel hassled.You friend is being reinforced on a(n) :

A) DRL schedule
B) DRO schedule
C) DRA schedule
D) DRI schedule