单选题Neap tides occur（）.Aat the start of spring，when the Sun is nearly over the equatorBonly when the Sun and Moon are on the same sides of the Earth and are nearly in lineCwhen the Sun and Moon are at approximately 90°to each other，as seen from the EarthDwhen the Sun，Moon，and Earth are nearly in line，regardless of alignment order
单选题
Neap tides occur（）.
A
at the start of spring，when the Sun is nearly over the equator
B
only when the Sun and Moon are on the same sides of the Earth and are nearly in line
C
when the Sun and Moon are at approximately 90°to each other，as seen from the Earth
D
when the Sun，Moon，and Earth are nearly in line，regardless of alignment order
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