The Distance Between $P _ { 1 } = ( 1,2,3 )$

Multiple Choice

The distance between $P _ { 1 } = ( 1,2,3 )$ and $P _ { 2 } = ( 4,5,6 )$ is

A) $\sqrt { 26 }$
B) $3 \sqrt { 3 }$
C) $\sqrt { 29 }$
D) $4 \sqrt { 2 }$
E) $\sqrt { 43 }$