Which of the Following Statements Is an Explanation of Why

Which of the following statements is an explanation of why it takes time for a monetary policy change to make an impact in the economy?

A) With large firms, investment planning is frequently long run, and plans tend to be completed once started.
B) Cycles are expected to enable the economy to pull out of a recession.
C) Previous records indicate that demand will return.
D) There is anticipation of government help down the road.