With a principal investment of $31,500, which account will have the greatest value after 4 years? simple interest: I = P • r • t interest compounded annually is A = P (1 + r)t interest compounded quarterly: A = P (1 + )4t A. 2.3% with interest compounded annually B. 2.1% with interest compounded quarterly C. 2.5% in a simple interest account D. 2.4% with interest compounded quarterly