Generate a multiple-choice question about renewable energy.
What is the primary source of renewable energy used globally?

A. Wind
B. Solar
C. Biomass
D. Hydropower
Complete the following task based on the instruction and optional input provided.### Instruction:
Generate a multiple-choice question about renewable energy.

### Output:
What is the primary source of renewable energy used globally?

A. Wind
B. Solar
C. Biomass
D. Hydropower