Choose the One Alternative That Best Completes the Statement or Answers

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
Solve the equation
- $\sqrt{7 \mathrm{x}-2}-9=0$

A) $\left\{\frac{83}{7}\right\}$

B) $\left\{\frac{11}{7}\right\}$

C) $\{81\}$

D) $\varnothing$