The Clean-Tech industry, concerned with renewable resources and related technologies such as solar and wind-powered electricity generation and sea-water desalination, is a rapidly growing industry as currently the world's interest in environmental protection rises.

A) is a rapidly growing industry as currently the world's interest in environmental protection rises
B) is rapidly growing as currently the world's interest in environmental protection increases
C) is rapidly growing because of the world's currently rising interest in environmental protection
D) grows rapidly as the world's current interest in environmental protection is rising
E) grows rapidly as currently the world's interest in environmental protection is on the increase

OA C

Source: Economist Gmat