Pete and his partner Mike made a huge profit in their software business together this year and have decided to use $20,000 of the profit for a
Christmas donation to their favorite charities. Each will contribute an amount proportional to the amount he invested in starting the business.
The investment ratio of Pete to Mike is 4:1. How much money will Mike get to donate to his charity?

A. $16,000
B. $5,000
C. $4,000
D. $3,000