Suppose a Computer Manufacturer Can Build Circuit Boards According to the Following

Multiple Choice

Suppose a computer manufacturer can build circuit boards according to the following process: 12 resistors + 20 insulators + 8 memory chips → 4 circuit boards.
How many circuit boards could you make using 30 insulators,assuming you have enough of all the other parts?

A) 20
B) 4
C) 10
D) 6
E) none of the above