Which of the following is NOT a factor determining supply?

A.

Cost of production

B.

Climatic condition or weather

C.

Income of the producers

D.

Number of producers

E.

Technological development

Correct answer is C

Supply will be determined by factors such as
- price,
- the number of suppliers,
- the state of technology, 
- government subsidies,
- weather conditions and
- the availability of workers to produce the good.

The income of the producer doesn't affect supply.