Which arabic nation is called the "island of pearls"?

The country known as the island of pearls is Bahrain. It is a small island in the Arabian Gulf. Bahrain is one of the smallest nation of Arabian Gulf and Arabian Gulf especially Persian Gulf is rich with the animal that produces pearls. Bahrain's small size and central location among Persian Gulf countries require it to play a delicate balancing act in foreign affairs among its larger neighbors.

Sorry I don't get part A but I hope Part B helps

Part B: The factored version is 6x^2(x^4+4)(x^2+2)(x^2−2)