Hi !!
The team has much work to do before the big game.
BEFORE is a preposition.
means "earlier than"
-
explanation
When before is a subordinating conjunction, it links two clauses together.
ex : The team has much work to do <em>before they play the game.</em>
<em>-</em>
<em>☺☺☺</em>
Is A) because you have a comma and they have to stop for a min
Can you show the picture I will help then