Not all ads are used to promote a product or to increase a company’s profits. Which is the following statement correct?

A．All the ads are used to promote a product or to increase a company’s profits.

B．Neither of ads are used to promote a product or to increase a company’s profits.

C．Some of ads are used to promote a product or to increase a company’s profits.

D．None of ads are used to promote a product or to increase a company’s profits.