The correct option is B meek
Bold means showing a willingness to take risks. The opposite of bold is meek, or quiet, gentle, and easily imposed on. Hence, Option C is correct. Among the rest of the options, gentle means moderate in action, effect, or degree; not strong or violent, weak means powerless, ineffective means moderate in action, effect, or degree; not strong or violent. These options do not express the intended antonym, hence incorrect.