Find the Area If the Distance Between Two Adjacent Dots $\frac { 1 } { 9 }$

Multiple Choice

Find the area if the distance between two adjacent dots in a row or column is one unit.
-What is the ratio of the area of B to the area of A.

A) $\frac { 1 } { 9 }$
B) $\frac { 3 } { 1 }$
C) $\frac { 9 } { 1 }$
D) $\frac { 1 } { 3 }$