Which of the following did not allow researchers to further explore below the ocean’s surface? a. rov’s b. alvin c. palomares d. bathysphere

The correct answer is (c) Palomares.

It is an agricultural town situated along  Mediterranean sea in Spain.This town was used for fishing and tourism. Due to an incident there was a midair collision of plane causing radioactive waste in that area. There is measurable amount of radioactive elements such as uranium, plutonium present .The infected area is approximately 10 hectares. The researchers has found no cases of health problems, or any type of contamination of food or water. But there are still some areas that remains contaminated and cannot be further touched. Pressence of such radioactive elements in the area makes it unsuitable for further research until it is completely clean.