以下结果表达式哪一个是正确的？A. x_1 = 2.0 times 10^2 pm 1.5 , (cm)B. x_2 = 200 pm 1.5 , (cm)C. x_3 = 200.0 pm 1.5 , (cm)D. x_4 = (2.00 pm 0.015) times 10^2 , (cm)

A. $x_1 = 2.0 \times 10^2 \pm 1.5 \, \text{cm}$

B. $x_2 = 200 \pm 1.5 \, \text{cm}$

C. $x_3 = 200.0 \pm 1.5 \, \text{cm}$

D. $x_4 = (2.00 \pm 0.015) \times 10^2 \, \text{cm}$