A Sold a Car to B on Installment Basis Secured

A sold a car to B on installment basis secured by a chattel mortgage over the thing and a promissory note co-signed by C. A failed to pay four (4) monthly installments. Under the contract in case of non-payment, the vendor can exercise any of the remedies under Art. 1484, NCC and in case of deficiency, the seller can recover the balance. What is the remedy of A?

A) A can file an action for the foreclosure of the mortgage and recover the unpaid balance because of the contract.
B) A can foreclose the mortgage and recover the unpaid balance because the Chattel Mortgage Law does not prohibit recovery.
C) A can foreclose the mortgage but cannot recover the unpaid balance because it is absolutely prohibited by law.
D) A can foreclose the mortgage and can recover the unpaid balance from C since B & C are solidarily liable.