Which of the following countries still cannot send a human in space orbit, according to the text

A．The effect of advertising on world markets.
B．Modem advertising techniques.
C．Forms of communication in the American colonies.
D．The early history of advertisin

A．How the natural world was described in Greek mythology.
B．What they observed directly.
C．The writings of philosophers from other societies.
D．Measurements made with scientific instruments,