Solve the equation. \( \frac{1}{4} x=\frac{3}{20} \) Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The solution set is \( \} \). (Type an integer or a simplified fraction.) B. There is no solution.

To solve the equation: \[ \frac{1}{4} x = \frac{3}{20} \] **Step 1:** Multiply both sides by 4 to isolate \( x \): \[ x = 4 \times \frac{3}{20} \] **Step 2:** Simplify the multiplication: \[ x = \frac{12}{20} \] **Step 3:** Reduce the fraction to its simplest form: \[ x = \frac{3}{5} \] **Conclusion:** The correct choice is: **A. The solution set is \( \left\{ \frac{3}{5} \right\} \).**