Given the problem below, which set of equations translates the information using variables a, b, and c?

old macdonald grew some apples, bananas, and coconuts. he decided to package his fruit and price it as follows:

1 apple, 5 bananas, 1 coconut for $14
3 apples, 3 bananas, 3 coconuts for $18
1 apple, 2 bananas, 3 coconuts for $14

a. a + 5b + c = 14
3a + 3b - 3c = 18
a + 2b + 3c = 14

b. a + 5b + c = 14
3a + 3b + 3c = 18
a + 2b + 3c = 14

c.2a + 5b + c = 14
3a + 3b + 3c = 18
a + 2b + 3c = 14

d. a + 5b + 3c = 14
3a + 3b + 3c = 18
a + 2b + 3c = 14