When using $first in a $group stage, the $group stage should follow a _______ stage to have the input documents in a defined order.

When using $first in a $group stage, the $group stage should follow a

1.	When using $first in a $group stage, the $group stage should follow a _______ stage to have the input documents in a defined order.
A.	$order
B.	$sort
C.	$asc
D.	None of the mentioned
Answer» C. $asc

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When using $first in a $group stage, the $group stage should follow a _______ stage to have the input documents in a defined order.

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