The correct answer is (A) To minimize; to make seem less important; to disparage. To regard, consider, or portray (something) as less valuable or important than it really is. To depreciate; to make small, dwarf;

Belittle is American. It comes from be + little.

Examples of use:

• She regularly belittled his achievements.
• They belittled the role played by the newcomer to the department.