Which would be a negative impact of the development of widespread commercial aviation in the modern world? a.) economic wealth is created in many countries b.)people can travel almost anywhere in a very short time c.) communicable diseases are spread rapidly around the world d.) the tourist industry is boosted in many locales

Boost the tourist trade always favors aviation. You have to get to a foreign country somehow. D is not the answer.

Creating wealth is not a hindrance to any industry. So A is incorrect.

B is kind of tough to get rid of. If aviation is already there you don't want to compete with an established industry. It is wrong only because C is a better choice.

Answer. C.

Idon't get it either

C. precise