How do monopolistic competitors try to make their products stand out?

The correct answer is "They use non-price competition such as advertising"

Explanation:

Monopolistic competition takes place when an industry has multiple firms that offer products that are alike but not equal and these firms have a little influence to restrict supply or raise prices to growth profits. These firms involved in the competition always try to stand out, so this is why advertising and marketing play a key role among them.

Advertise to create a stronger loyalty to their goods.