What Is the Primary Benefit of the Automatic Stabilizers

What is the primary benefit of the automatic stabilizers?

A) They require legislative action, so there is a lag in the tool's response to fluctuations in the business cycle, and there is time to identify the spillover effects.
B) They act to keep the economy at the full employment output level.
C) They provide public assistance through legislative decision making.
D) They require no new legislative action, so there is no legislative lag before these tools respond to fluctuations in the business cycle.