The correct option is C Adjourn
To adjourn is to break off (a meeting, legal case, or game) to resume it later. For example, "the meeting was adjourned until December 4". Hence, Option C is correct. Among the rest of the options, convene means come or bring together for a meeting or activity, terminate means to end something, procrastinate means delay or postpone action. These do not express this meaning, hence incorrect.