If an investment of $4 000 will grow to $ 6 520 in four years with monthly compounding, the effective annual interest rate will be closest to:（）

A. 11.21%

B. 12. 28%

C. 12. 99%

某甲将某乙杀死之后，为掩盖罪行又放火烧毁某乙所住房屋，结果又引起周围13家房屋着火，烧伤5人，直接经济损失13万。对某甲应当( )。

A．以故意杀人罪从重处罚

B．以放火罪处罚

C．以故意杀人罪处罚

D．以故意杀人罪和放火罪数罪并罚