The correct answer is (A) To cause to happen; to hasten the occurrence of; to bring about prematurely, hastily, or suddenly; to urge on; to hurry; to rush violently; to hurl down; to fling.

Precipitate comes from Latin praecipitare (to hurl downward).

Examples of use:

• Her comments immediately precipitated an argument.
• The illness of the country's leader precipitated a crisis.