Which shows a complex sentence with a correctly indicated main clause ?

a. the ballpark is never interesting, -unless we bring bruno along-

b. english class is so boring, -except when we get to read shakespeare! -

c. -because were all minors,- no one will rent us a beach house.

d. whenever we look at houses, -my dad says he doesn't want to move.-

i put dashes around the clauses that were bold in the actual question, so those are the clauses the sentence is focusing on