What is a filibuster? a. the number of members needed to be present for a vote to occur b. an effort to talk long enough to prevent a vote on a bill c. a rule for limiting the time for debate on a bill d. the practice of setting aside and not considering a bill

b. an effort to talk long enough to prevent a vote on a bill.

Explanation:

A filibuster is a political process which consists of debating over a proposed piece of legislation in a way that purposely delays or prevents having to make a decision on it. This usually takes place in a Parliament or Congress, as these are generally the bodies of government that deliberate on legislation. This form of obstruction in a legislature is a powerful political device.

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

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democracy

explanation: