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.
A.<span>investigating a subject in order to discover or revise facts, theories, and applications
</span>
The 4 possibilities are :
therefore.......
as you can see....
in conclusion ....
Answer:
I think that this sentence would be compound if you don't include the word 'and' in your clauses.
