- The sentence that correctly uses commas to set off an appositive phrase is:
Sabrina, my favorite cousin, is coming over for a sleepover next weekend.
- The sentence that correctly uses commas to set off a long introductory element is:
While my mom is out of town, I am going to stay with my grandparents.
- The sentence that uses commas correctly to separate coordinate adjectives is:
The small, mischievous squirrel stole my sandwich.
Let me know if you need any further assistance!