Read the Following Scenario and Answer the Question Below

Multiple Choice

Read the following scenario and answer the question below.
In Johannesburg, South Africa, the South West Township (Soweto) was one of several areas established early in the last century for blacks to live away from the white ruling minority. On the hills surrounding Soweto, the company that provides South Africa's electricity, Eskom, built a large, coal-burning, electricity-generating plant. The electricity was for white areas of Johannesburg, miles away from the plant. The residents of Soweto had no electrical connections.
-Other than in downtown Johannesburg, the worst air pollution in the region in the year 2000 was in Soweto. The probable explanation is that in downtown Johannesburg ___________, while in Soweto ___________.

A) automobile traffic was the cause; the burning of fuels in each home for heating, light, and cooking was the major contributor to indoor and outdoor air pollution
B) automobile traffic was the cause; automobile traffic was also the cause
C) gasoline-powered electrical generators were the cause; trash incinerators were a problem
D) trash incinerators were a problem; gasoline-powered electrical generators were the cause
E) coal-fired electrical plants were the cause; automobile traffic in overcrowded areas was the problem