The correct answer is:
C. One of the numbers in standard form is large (>1) and the other number in standard form is small (<1).
Explanation:
- \(4.23 \times 10^{-5}\) is equal to 0.0000423, which is less than 1 (a small number).
- \(4.23 \times 10^{5}\) is equal to 423,000, which is greater than 1 (a large number).