What right did the u. s. retain when it gave the panama canal away? . a. the right to use the canal first. b. the right to cheaper shipping. c. the right to control who used the canal. d. the right to protect the canal.

"The right to control who used the canal" is the right among the choices given in the question that the U.S. retained when it gave the Panama Canal away. The correct option among all the options that are given in the question is the third option or option "C". I hope that this is the answer that has helped you.