​Find the Absolute Value of the Complex Number 5 $\sqrt { 34 }$

​Find the absolute value of the complex number 5 + 3i. ​

A) ​ $\sqrt { 34 }$
B) ​34
C) ​ $$2 \sqrt { 34 }$$
D) ​5 + 3​i
E) ​ $2 \sqrt { 2 }$