When adding 3.4 × 10⁵ and 2.1 × 10⁴, what is the first step?

• A. Adjust the exponent of 2.1 × 10⁴ to match 10⁵.
• B. Subtract the exponents.
• C. Add the coefficients directly.
• D. Multiply the coefficients.

Answer: (A)