How Does Mercury's Rotation Relate to the Sun

How does Mercury's rotation relate to the Sun?

A) Its rotation rate is 2/3 as long as its year, due to tidal resonances.
B) It always keeps one face tidally locked toward the Sun, as our Moon does with us.
C) Its day is the same length as its year.
D) Its year is much shorter, only 88 days, than its slow rotation of 243 days on its axis.
E) It does not spin at all, being tidal stopped by the solar tides.

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