Kim Lee is analyzing two projects. The first requires a $1,200 initial investment and returns $600 a year for four years. The second project requires a $1,500 initial investment and returns $700 a year for four years. What is the crossover point for these two projects?

a. 4.25%

b. 6.37%

c. 8.14%

d. 12.59%

e. The crossover point cannot be computed based on the information provided.