What limits did the u. s., u. s.s. r, and great britain agree to regarding nuclear weapons testing in 1963? a.) each nation was permitted a limited number of tests per year b.) testing could only occur underground c.) testing plans had to be submitted to the other countries for approval d.) all testing had to take place on uninhabited islands

The correct answer is B.) testing could only occur underground

This was because the explosions could be contained and no radiation would be released into the atmosphere. It was banned to do it outside, to do it in water, or to do it in outer space. They were allowed to test only underground and make sure that the tests would be safe for the world. Studying earthquakes now can show if tests are being conducted without the knowledge of the public.