Extensive phosphate mining on a island has exhausted its mineral resources and made the soil unfit for agriculture. this has caused discontent among residents of the island. which of these is the most effective method to solve this problem? a) rebuilt the ecosystem by importing animals and plants b) start the process of tilling the land to use it for agriculture c) formulate and implement a plan to rehabilitate the residents d)appoint geologists to find new phosphate rich areas on the land