$\mathrm{X}$ is $1 \mathrm{~km}$ northeast of $\mathrm{Y} . \mathrm{Y}$ is $1 \mathrm{~km}$ southeast of $Z . \mathrm{W}$ is $1 \mathrm{~km}$ west of $Z . \mathrm{P}$ is $1 \mathrm{~km}$ south of $\mathrm{W}$. $\mathrm{Q}$ is $1 \mathrm{~km}$ east of $\mathrm{P}$. What is the distance between $\mathrm{X}$ and $\mathrm{Q}$ in $\mathrm{km}$ ?
(A) 1
(B) $\sqrt{2}$
(C) $\sqrt{3}$
(D) 2
$\mathrm{X}$ is $1 \mathrm{~km}$ northeast of $\mathrm{Y} . \mathrm{Y}$ is $1 \mathrm{~km}$ southeast of $Z . \mathrm{W}$ is $1 \mathrm{~km}$ west of $Z . \mathrm{P}$ is $1 \mathrm{~km}$ south of $\mathrm{W}$. $\mathrm{Q}$ is $1 \mathrm{~km}$ east of $\mathrm{P}$. What is the distance between $\mathrm{X}$ and $\mathrm{Q}$ in $\mathrm{km}$ ?
(A) 1
(B) $\sqrt{2}$
(C) $\sqrt{3}$
(D) 2