A semijoin is which of the following?

A Only the joining attributes are sent from one site to another and then all of the rows are returned.
B All of the attributes are sent from one site to another and then only the required rows are returned.
C Only the joining attributes are sent from one site to another and then only the required rows are returned.
D All of the attributes are sent from one site to another and then only the required rows are returned.

Correct Answer: Only the joining attributes are sent from one site to another and then only the required rows are returned.

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