Calculate (7.89 x 10²) x (2.0 x 10¹) and express the result with the correct number of significant figures.

• A. 1.58 x 10⁴
• B. 1.578 x 10⁴
• C. 1.5789 x 10⁴
• D. 1.6 x 10⁴

Answer: (D)