SC - function X and function Y

Dear instructors,

I am afraid I cannot approach this problem, any instructors could help me ?

Besides the color of its coat, the most notable characteristic of the snow leopard tends to be its heavily tufted tail, which accounts for 50% of the animal’s length and which has two notable functions: it keeps the animal warm—the leopard will wrap the tail around its head—and it can be used to dispatch small prey.

A.it keeps the animal warm—the leopard will wrap the tail around its head—and it can be used to dispatch small prey

B.the leopard is kept warm by the tail, which can also be used to dispatch small prey

C.the tail keeps the animal warm by wrapping around the leopard’s head and small prey can be dispatched

D.it keeps the animal warm, with the leopard wrapping it around its head, and it can be used in dispatching small prey

E in keeping the animal warm, it will wrap the tail around its head, and it can also be used to dispatch small prey

[spoiler]OA:A[/spoiler]

Please, PLEASE,PLEASE

thanks in advance
have a nice day
>_~