The correct answer is (A) To shake or move briskly, to move to and fro in a violent way. To impart motion to. To attempt to arouse public interest in, call attention to, or debate an idea, cause, or social or political issue. To attempt to stir up feelings and involve the public emotionally by writing or through demonstrations, slogans, etc. in order to create disorder or demand reform.

Examples of use:

• The propellers agitated the water behind the ship as the anchors were slowly raised.
• She agitated against the proposed motion prior to the beginning of the meeting.