Look at the four squaresthat indicate where the following sentence could be added to the p

Look at the four squaresthat indicate where the following sentence could be added to the passage. Nor is development being restricted to the Andes. Where would the sentence best fit？

A．Square Ａ.

B．Square Ｂ.

C．Square Ｃ.

D．Square Ｄ.

请帮忙给出正确答案和分析，谢谢！