A student observed the Moon with a telescope for six months. He concludes that regardless of the time of the observation the side of the Moon that faces Earth is always the same, as shown in the image. What is the best explanation for this phenomenon?

a.) the Moon rotates on its axis at a faster rate than it orbits Earth.

b.) the Moon rotates on its axis at the same rate at which it orbits Earth.

c.) the Moon does not rotate on its axis due to its comparatively smaller size.

d.) the Moon does not rotate on its axis due to the strong gravitational pull of Earth.

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