If Vector $\overrightarrow { \mathrm { C } }$ Is Added to Vector

If vector $\overrightarrow { \mathrm { C } }$ is added to vector $$\overrightarrow { \mathrm { D } }$$ ,the result is a third vector that is perpendicular to $$\overrightarrow { \mathrm { D } }$$ and has a magnitude equal to 3 $\overrightarrow { \mathrm { D } }$ .What is the ratio of the magnitude of $\overrightarrow { \mathrm { C } }$ to that of $\overrightarrow { \mathrm { D } }$ ?

A) 1.8
B) 2.2
C) 3.2
D) 1.3
E) 1.6