The example of consent would be option B: "you say yes I would like to do that." This clearly indicates that the individual has freely and enthusiastically agreed to the activity.
Options A, C, and D do not demonstrate clear, affirmative consent. Option A involves initial refusal and subsequent pressure, which is not consent. Option C ("you say nothing but smile") and Option D ("you shrug") are ambiguous and do not provide a clear indication of consent. Consent should always be explicit, informed, and given without coercion.