The moving parts of a machine which weigh 1 tonne perform vertical simple harmonic motion with an amplitude of 2.5 cm and a period of 0.5 sec. The base of the machine weighs 3 tonnes and rests on the ground. Maximum reactions on the ground would be

• A. 3.6 tonnes
• B. 2.4 tonnes
• C. 4.0 tonnes
• D. 4.8 tonnes
• E. 4.4 tonnes