Select the option that uses a correct subordinate conjunction to join the following sentences together: we want to go to the fair. we're going to have to save our money.

As, Since.

Explanation:

Subordinate conjunctions exemplifies the part of speech and complex sentences that act as link to join two sentences out of which one being a dependent clause and the another being the independent one. These are used for marking the significance of principle(independent) clause and the subordinate(dependent) clause to provide a transition between two ideas portrayed in the same sentence or statement. According to the definition, there are many subordinate conjunctions that could be used here. Few of them are following :

" As we want to go to the fair, we're going to have to save our money".

"Since we want to go to the fair, we're going to have to save our money".