I am not 100% sure but I think it is c. Your best bet is to look it up on google that’s what I tried but my google is bugged out.
Perseus was the king for on the day because A)he wants to return to Andromeda's homeland.
The clause <em>Jacob had to buy a new cell phone </em>is an independent clause, meaning that it is complete and can stand on its own.
The remaining part, however, is a subordinate clause, or an adverb clause, to be more precise.