The main purpose of this text is to______.A．convi

The main purpose of this text is to______.

A．convince the reader that the Space Race was a positive contribution to mankind

B．educate the reader on the Space Race and its implications

C．present a hypothesis on the effects of the space program on human development

D．advocate on behalf of greater effort and investment into the space program

请帮忙给出正确答案和分析，谢谢！