The answer should be A) .
Oversight and public education are examples of "implied" Congressional functions, since these actions are not specifically mentioned in the Constitution, but are within Congresses' umbrella of power.
A filibuster is a strategy used by members of the Senate in which individuals continuously talk or give a presentation in order to prevent or delay the Senate from voting on a bill.
A filibuster can be defeated by a cloture vote. A cloutre vote can be called in the Senate during the filibuster process. This calls for an up or down vote to end the debate on a specific topic. In order to end the filibuster, there must be a super majority vote (2/3rds vote).