Cean exploration is limited by a. lack of technology b. expense c. favorable weather conditions d. all of the above

If you're talking about ocean exploration, the answer is A. Due to lack of technology, there will be a problem when it comes to the navigation when the exploration happens. Also, there will be a problem on the different parts of the ship if there is a problem in the technology, and it's better off to cancel the exploration if that happens.

Iprobably use google