Well,
A) is incorrect because Reagan eased environmental restrictions, which did the exact opposite of protecting the environment,
B) is right because the 1980s did have a pretty big technological surge, and Reagan's policy towards business definitely upped the demand for *any* products, because everyone started spending a lot,
C) is incorrect because Reagan took away funding from social programs that helped the poor/disadvantaged/elderly,
and D) is incorrect because AIDS was *THE* main epidemic of the 1980s, and Ronald Reagan never mentioned it once as far as I'm aware.
Answer:
they are other obstacles that prevent new competitors from entering an industry or area of business. barriers to entry benefit existing firms because they protect their revenues and profits
Explanation:
