GKFix MCQ Question

What is the result of subtracting 2.7×10⁻⁶ from 5.8×10⁻⁶?

• A. 3.1×10⁻⁶
• B. 31×10⁻⁷
• C. 0.31×10⁻⁵
• D. 310×10⁻⁸