The diagram below shows the positions of Earth, sun, and moon during two types of tides.

The picture on the left is labeled Tide 1 and shows the Earth and sun along the same horizontal line and moon above Earth.

The picture on the right is labeled Tide 2 and shows the Earth and sun along the same horizontal line and the moon below Earth.

What impact do both positions have on the tides?

A: The difference is greatest between the high and low tides.
B: The difference is almost equal to the high tide between the high and low tides. C: The gravitational forces due to the sun and the moon cancel each others' effect.
D: The gravitational forces due to the sun and the moon amplify each others' effect.