Direction (Q. No. 14 and 15): Read the passage carefully and answer the following questions, Ocean waves are derived sources of energy. Wind is the agent which transfer the Sun's energy to the surface of the sea. The unequal solar heating of the Earth generates wind and wind blowing over water generates waves. The energy possessed by ocean and sea waves is called wave energy. Various systems have been designed to use wave energy for commercial production of electricity.
The main disadvantage of wave energy is

Options

A. Wave power project is expensive
B. Sea-bird population could be affected by wave energy structures
C. Some designs are noisy
D. All of these