Which does the law of demand do check all that apply

Well first off there are any answers but the answer to

Which does the law of demand do? 
-allows producers to respond to consumers
-allows consumers to influence prices

Demand is an economic principle that describes a consumer's desire and willingness to pay a price for a specific good or service. Holding all other factors constant, an increase in the price of a good or service will decrease demand, and vice versa. It is also an increase in price due to an increase in demand. 

Choices? multiple choice

The answer would be a