What Has Been a Consequence of Domestic Policymaking on the Balance

What has been a consequence of domestic policymaking on the balance of power between the legislative and executive branches over time?

A) The balance of power has remained stable and equal.
B) Presidents have tended to accrue power at the expense of Congress.
C) Congress has tended to accrue power at the expense of the president.
D) Presidents have temporarily gained power but have always lost it later