Answer: Option (c) is correct.
Step-by-step explanation:
The demand curve is a graphical representation of relationship between the price of a commodity and the quantity demanded by the consumer at the prevailing market price. It is a downward sloping curve. It also shows the quantity of goods that a consumer demands. It states that there is a inverse relationship between the price of a commodity and its quantity demanded which means that if the price of a commodity increases then as a demand for that commodity decreases.