On social issues, liberals tend to stress

When you randomize within blocks, you should

A) assign blocks of participants to groups instead of single participants. B) sample blocks of participants instead of single participants C) use stratified random sampling with blocks of participants. D) assign blocks of participants so that one participant is assigned to each group before moving onto the next block of participants.

Donations to __________ do not have to be disclosed unless a donor gives money specifically for a political ad

a. 527 groups b. 501(c) groups c. political action committees (PACs) d. candidates' campaigns