A mass on a spring vibrates in simple harmonic motion at a frequency of 4.0 Hz and an amplitude of 8.0 cm. If the mass of the object is 0.20 kg, what is the spring constant?( )
选项：

A:40 N/m
B:87 N/m
C:126 N/m
D:160 N/m
E:190 N/m