During His First Year in Office, When He Was Working

During his first year in office, when he was working with a Democratic House and Senate, President Obama saw 96 percent of the legislation that he favored win congressional support.Although this percentage was high by historical standards, a larger degree of support was not unusual since:

A) presidents typically have their greatest successes with legislation in their first hundred days in office.
B) Obama had won the presidency with a landslide electoral victory, something that typically gives presidents more political capital with Congress.
C) presidents usually find more success in their legislative agenda when the president's party enjoys majorities in both chambers.
D) the day-to-day media focus on presidents is more consistent and intense after presidents are first elected, and party support in Congress tends to be greater in turn.