Calculate (6.78 x 10²) x (3.0 x 10¹) and express the result with the correct number of significant figures.

• A. 2.034 x 10⁴
• B. 2.0340 x 10⁴
• C. 2.0 x 10⁴
• D. 2.03 x 10⁴

Answer: (C)