To solve the equation \( \frac{3}{\frac{1}{6}} \), you can rewrite it using multiplication by the reciprocal:
\[ \frac{3}{\frac{1}{6}} = 3 \times 6 = 18 \]
Now looking at the responses given:
A. \( \frac{1}{18} \)
B. \( \frac{1}{15} \)
C. 15
D. 18
The correct answer is D. 18.