973.Regarding the operational concepts of the 'handbrake (parking brake device)' and 'footbrake (main brakesystem)', which of the following statements is correct?
(A) Both have similar structures and either one canbe used interchangeably.
(B) Both can be used together when starting on an uphill slope to prevent thevehicle from rolling backward.
(C) Using both simultaneously will cause damage to the transmission.

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