Unions Often Encourage the Buying Public to "Look for the Union

Unions often encourage the buying public to "look for the union label" primarily because

A) they feel that only U.S.and/or union-made goods are of high quality.
B) they feel that it is un-American to buy goods from foreign producers.
C) doing so may increase demand for the product they produce, which in turn may increase the wage rate paid to union employees.
D) they realize that Americans are too busy to take time to gather all the important information about a product and these labels are a way of informing the buying public that union-made goods are well made.