Add or Subtract the Radical Expressions as Indicated, If Possible $9 \sqrt { 2 } + \sqrt { 162 } - 3 \sqrt { 18 }$

Multiple Choice

Add or subtract the radical expressions as indicated, if possible. $9 \sqrt { 2 } + \sqrt { 162 } - 3 \sqrt { 18 }$

A) $54 \sqrt { 2 }$
B) $63 \sqrt { 2 }$
C) $9 \sqrt { 2 }$
D) $6 \sqrt { 146 }$