The Presidency Was Transformed During the Progressive Era as Popular

The presidency was transformed during the Progressive Era as popular ideas and expectations about how presidents should use the power granted by the Constitution changed, but at the same time, __________.

A) Congress sought to limit the formal constitutional powers of the president
B) the president's formal constitutional powers remained unchanged even though presidents sought to expand them
C) there were no concurrent changes to the president's formal constitutional powers
D) the president's formal constitutional powers expanded in spite of Congress's opposition