On Christmas Day, you open a present; it is not what you wanted or needed. In fact, you are quite disappointed. Nevertheless, you give the biggest smile you can. Assuming you are adept at putting on a "good face,"

what clue will provide evidence that you did not like the present?
a) A false smile is given away by visible teeth.
b) The very slight flaring of the nostrils is a giveaway.
c) The size of the whites of the eyes is the best clue that you did not enjoy the present.
d) A telltale sign appears around your eyes because the muscles there are not under voluntary control

D