Would the following factors increase or decrease the ability of domestic auto manufacturers to raise prices and

Question:

Would the following factors increase or decrease the ability of domestic auto manufacturers to raise prices and profit margins? Why?
A. Decreased import quotas
B. Elimination of uniform emission standards
C. Increased automobile price advertising
D. Increased import tariffs (taxes)
E. A rising value of the dollar, which has the effect of lowering import car prices