Which of the following events would cause a movement along the demand curve for U.S. produced clothing,

Question:

Which of the following events would cause a movement along the demand curve for U.S. produced clothing, and which would cause a shift in the demand curve?
a) The removal of quotas on the importation of foreign clothes
b) An increase in the income of U.S. citizens
c) A cut in the industry’s costs of producing domestic clothes that is passed on to the market in the form of lower prices