 
			 
			MCQOPTIONS
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				| 1. | What is true about $group stages in aggregation framework ? | 
| A. | This is a filtering operation and thus this can reduce the amount of documents that are given as input to the next stage. | 
| B. | This does the actual aggregation | 
| C. | Sorts the documents | 
| D. | None of the above | 
| Answer» C. Sorts the documents | |