B. It would be less difficult to pass Democratic policy ideas through the Senate between 2008 and 2010, compared to after the 2010 election.
Explanation:
Between 2008 and 2010, the democratic party had 57 Senators in the senate, compared to the 51 they had after the elections of 2010, this means that it would be more difficult after 2010 to pass democratic policy ideas, having less senators from the democratic party in the senate.