GKFix MCQ Question

What is the result of subtracting 2.7×10⁻⁷ from 5.8×10⁻⁷?

• A. 3.1×10⁻⁷
• B. 31×10⁻⁸
• C. 0.31×10⁻⁶
• D. 310×10⁻⁹