To 'shirk' is to avoid or neglect. A: 'Avoid' suggests the act of staying away from or keeping clear of a particular task, responsibility, or obligation. This is a synonym for 'shirk'. B. 'Escape' implies getting away from or eluding a duty or responsibility, often with the intention of avoiding it. This too, is a synonym for 'shirk'. C. 'Evade' means to dodge or sidestep a task, responsibility, or obligation, usually with the intention of not fulfilling it or escaping its consequences. Thus, this can also be considered a synonym of 'shirk'. D. "Oppose" is not a synonym of "shirk." "Oppose" means to resist or go against something, which is different from avoiding or evading a task or responsibility. Thus, the correct option is C.