Biology

The correct answer is: C.Rough endoplasmic reticulum (RER).

The rough endoplasmic reticulum (RER) is responsible for carrying proteins through the cell. It has ribosomes attached to its surface, which are involved in protein synthesis. Once proteins are synthesized, they are processed and transported through the RER to other parts of the cell, such as the Golgi apparatus for further modification and sorting.

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