Write the complex number 2-2√3i in polar form. Select the correct choice below and fill in the answer box(es) within your choice.
A. z= ____ (cos ____ +i sin ____ )
B. z=____ (sin ____ +i sin ____ )
C. z= ____ (sin ____ +i cos ____ )
D. z= ____ (cos ____ +i cos ____ )