The Semiconductor Industry Prospered in the United States Until the Early

The semiconductor industry prospered in the United States until the early 1980s because

A) of earlier government support of funding for research & development (R&D) and defense related purchases.
B) tariffs and quotas kept Japanese chips out of the American market.
C) the US government restricted the ability of Japanese semiconductor firms to purchase existing American firms.
D) tariffs and quotas kept European chips out of the American market.
E) of different factor advantages as predicted by standard trade theory.