B. a character who clashes with the main character in order to reveal the main character's traits
Answer:
I <u>have stuck</u> it with glue.
Explanation:
Present perfect describes something that occurred or was the state of things at an unspecified time in the past.
e.g I<u> have walked</u> on this path before.
Using a celebrity to endorse products will help the sales and make people want to buy it since they see a popular and almost likely successful person promoting it. Some people will just buy it since a celebrity bought it or because they’ve seen the celebrity use it and wants to try it. hope this helps :D