A) Phobos would rise in the west, move rapidly across the sky, and set in the east, and it would do so only once per Martian day.
B) Phobos would rise in the east, move rapidly across the sky, set in the west, and appear several times per Martian day.
C) Phobos would remain almost stationary in the sky, in almost synchronous orbit, because its period is close to Mars's rotation period.
D) Phobos would rise in the west, move rapidly across the sky, set in the east, and appear several times per Martian day.
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