Suppose the President Negotiates Lower Tariffs on Imported Pianos

Suppose the president negotiates lower tariffs on imported pianos.The domestic piano industry can appeal that decision under the:

A) escape clause,if they can prove they are substantially injured by the increased volume of piano imports
B) infant industry clause,if the lower tariffs cause unemployment to increase in the domestic piano industry
C) escape clause,if the lower tariffs cause unemployment to increase in the domestic piano industry
D) infant industry clause,if they can prove they are substantially injured by the increased volume of piano imports