Use reasoning to lead to the answer of the following question:
What is a mobile launching platform found in the ocean?\nOptions:\n- launch pad\n- circus\n- aircraft carrier\n- large open area\n- space station

aircraft carrier
Aircraft carrier is a warship that serves as a seagoing airbase, equipped with a full-length flight deck and facilities for carrying, arming, deploying and recovering aircraft.

Aircraft carrier is a mobile launching platform found in the ocean.

.

Therefore, the answer is aircraft carrier