Consider the [CoCl₆]^4- Ion

Consider the [CoCl₆]^4- ion. Which response includes all the following statements that are true and no false statements? I.The oxidation number of Co is -4.
II. The coordination number of cobalt is 6.
III.It is paramagnetic.
IV.It is a low-spin complex.

A) I, II, III, IV
B) I, IV
C) II, III
D) I, III
E) III, IV