According to the passage, cell phones were launched______.A．in the late 1970sB．between 195

According to the passage, cell phones were launched______.

A．in the late 1970s

B．between 1955 and 1960

C．in the late 1955s

D．in the early 1990s

请帮忙给出正确答案和分析，谢谢！