Members of Congress may act as delegates or trustees, but they must win the next election to pursue either role. Legislators seeking reelection as a precondition to other goals is an example of which type of action?

Instrumental behavior

Explanation:

Instrumental behavior is the behavior that is performed to attain something or to reach desired goal or getting any task completed as intended .This behavior is carried our for positive reinforcement or negative reinforcement .

According to the question, industrial behavioral action is carried out through Legislators.As, they are trying to attain goal of winning election through conducting reelection , instrumental approach of reinforcement is used.  

answer; researchers typically cannot control people's sexual behaviors as would be necessary in an experiment;

answer is b.shrapnel