A man weighing `60kg` stands on the horizontal platform of a spring balance. The platform starts executing simple harmonic motion of amplitude `0.1m` and frequency `(2)/(pi)`. its which of the following statement is correct ?
A. The spring balance reads the weight of man as 60 kg
B. The spring balance reading fluctuates between 60 kg and 70 kg.
C. The spring balance reading fluctuates between 50 kg and 60 kg.
D. The spring balance reading fluctuates between 50 kg and 70 kg.