The third sentence is the correct answer, as all the other sentences are incomplete.
I'm pretty sure it's the last one; Everyone was having a wonderful time at the party, because the present tense helps it feel more active.
B- They must marry so Heathcliff can inherit Edgar’s property through Cathy
Answer:
A star at the center of our solar system.
Explanation:
An appositive is a noun or a noun phrase that renames another noun right beside it. It can be short or long.
On this case, the appositive is nonessential because its surrounded by commas, separated from the rest of the sentence. It interrupts the sentence.
If the information given in the appositive is essential to the sentence´s meaning is called Appositive restrictive and commas are no longer used for these cases.
I hope this answer helps you.