Point out the correct statement :

Question

Options:

A . Applications can use $center without having a geospatial index

B . Before 3.0, a geospatial index must exist on a field holding coordinates before using any of the geospatial query operators

C . To use $centerSphere, specify an array that contains grid coordinates of the circle's center point

D . None of the mentioned

Answer: Option A

However, geospatial indexes support much faster queries than the unindexed equivalents.

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