Choose the One Alternative That Best Completes the Statement or Answers

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
-For a fixed amount of principal, the simple interest varies jointly with the rate and the time. If the simple interest is $\$ 1200$ when the rate is $4 \%$ and the time is 6 years, find the simple interest when the rate is $5 \%$ and the time is 10 years.

A) $\$ 5000$
B) $\$ 2750$
C) $\$ 250$
D) $\$ 2500$