Once mRNA is made it travels A. out of the cytoplasm, into the nucleus where a ribosome will attach to it.

B. out of the nucleus, into the cytoplasm where a ribosome will attach to it.

A. out of the cytoplasm, into the nucleus where a ribosome will attach to it.

Explanation:

Messenger RNA (mRNA) then travels to the ribosomes in the cell cytoplasm, where protein synthesis occurs (Figure 3). The base triplets of transfer RNA (tRNA) pair with those of mRNA and at the same time deposit their amino acids on the growing protein chain.