Answer:
whereas
Step-by-step explanation:
The coordinating conjunctions join two parts of sentences. In this case, the conjunction shows the relationship between two sentences. In this case, we have two sentences or clauses:
- He was going to a birthday party.
- He wanted to bake a cake
So, the conjunction would effectively combine the two sentences here. The correct conjunction to use is whereas. This how the two events would occur at the same time.