Answer:
[tex]\boxed{ \text{B. }\frac{2}{ 3}}[/tex]
Step-by-step explanation:
The scale factor (C) is the ratio of corresponding sides of the two pyramids.
The ratio of the areas is the square of the scale factor.
[tex]\frac{A_{1}}{ A_{2}} =C^{2}\\ \\\frac{48 }{108} = C^{2}\\\\ \frac{4}{9} = C^{2}\\\\ C = \frac{2}{3}\\\\[/tex]
The scale factor is [tex]\boxed {\frac{2}{3}}[/tex].
