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Why is the gyro and accelerometers shock mounted to the body?

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Why is the gyro and accelerometers shock mounted to the body?

(a) Impact protection

(b) Reduce drift error

(c) Prevent voltage surges

(d) Limit vibration errors

I have been asked this question by my college director while I was bunking the class.

This intriguing question originated from Strap Down and Gimballed Inertial Navigation Systems topic in division Satellite Radio Navigation  & Inertial Navigation of Avionics

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Correct choice is (d) Limit vibration errors

Best explanation: The gyros and accelerometers are rigidly mounted on a block with temperature sensors. The block is usually shock mounted to the vehicle to control the bandwidth of the motion sensed at the instruments. Shock mounting limits vibration rectification errors within the errors themselves.

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