What is the best scenario for the most profit in purchasing office equipment?

A.) pay $30,000 cash for $45,000 in revenue
B.) pay an installment loan of $25,000 with APR of 15% for 18 months and $40,000
C.) pay an installment loan of $28,000 with APR of 12% for 30 months and $45,000 in revenue
D.) pay an installment loan of $32,000 with APR of 20% for 12 months and $50,000 in revenue