On a regular day, a certain manufacturing line produces 100 units, of which 1% are defective. On a rush day, the same li

On a regular day, a certain manufacturing line produces 100 units, of which 1% are defective. On a rush day, the same line produces 125 units, of which 4% are defective. How many more non-defective units does the manufacturing line produce on a rush day than on a regular day?

A. 20
B. 21
C. 25
D. 120
E. 125

[spoiler]OA=B[/spoiler]

Source: Veritas Prep