Joey bought five bags for a total discounted package price of ₱1,000 from his friend Liza, payable in 3 months. Which of the items below describes it as a form of an indivisible obligation? a. Joey has to pay ₱1,000 to Liza on January 31, 2022. b. Joey can pay ₱1,000 to Liza on March 31, 2022. c. Liza has to deliver 1 unit to X upon each installment payment. d. Liza has todeliver all 5 bags units to Joey on their agreed delivery schedule on January 31, 2022.