How is a responsibility different from a duty?
A)A responsibility is something that one will do in the future; a duty is something that one did in the past.
B) A responsibility is something that one always does; a duty is something that one never does.
C)A responsibility is something that one should do; a duty is something that one must do.
D) A responsibility is something that one wants to do; a duty is something that one needs to do.