During normal flight with a vacuum driven attitude indicator, control pressures normally should not move the horizon bar more than单项选择题

A

One-half bar width, with not more than an additional one-half bar width for normal flight deviations.

B

One-half bar width, with not more than an additional one bar width for normal flight deviations.

C

One bar width, with not more than an additional one bar width for normal flight deviations.

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