What Is the Equivalent Resistance Between Points a and B $\Omega$

Multiple Choice

What is the equivalent resistance between points A and B in the figure when R = 18 $\Omega$ ?

A) 48 $\Omega$
B) 64 $\Omega$
C) 80 $\Omega$
D) 96 $\Omega$
E) 110 $\Omega$