Write the Product as a Sum or Difference of Trigonometric $\cot \theta$

Multiple Choice

Write the product as a sum or difference of trigonometric functions.
-Find $\cot \theta$ if $\csc \theta = \frac { \sqrt { 10 } } { 3 }$ and $\theta$ is in quadrant $\mathrm { I }$ .

A) $\frac { \sqrt { 10 } } { 10 }$
B) 3
C) $\sqrt { 10 }$
D) $\frac { 1 } { 3 }$