Answer :
The subjects of this sentence are B. drivers and D. they. Money is not the subject, but the object and turnpike is part of the prepositional phrase. Drivers is the subject and they is replacing drivers in the second half of the sentence.
The subjects in this compound sentence are: B drivers and D they.
This compound sentence is made up of two independent clauses. The subject in the first independent clause is the noun "drivers" because it agrees with the verb "need" in number. "Turnpike" cannot be the subject because it refers to the place where the drivers are and "money" is not neither because that is the object which is needed. Apart from the reasons stated above, "turnpike" and "money" cannot be the subject because they do not agree with the verb "need" in number.
As for the second independent clause, the subject is the word "they" since it refers to the previous subject "drivers".
