OG T48

阿萨德积极

It is called a sea, but the landlocked Caspian is actually the largest lake on Earth, which covers more than four times the surface area of its closest rival in size, North America's Lake Superior.

C. though called a sea, the landlocked Caspian is actually the largest lake on Earth, covering
E. despite being called a sea, the largest lake on Earth is actually the landlocked Caspian, covering

正确答案是C，只是我想问一下E中的being的使用是正确的吗？
还有就是being应该在什么情况下使用呢？