The standard language of many countries, such as Standard Englis

The standard language of many countries, such as Standard English, Standard French and Mandarin Chinese, is also designated as the ______ language.
A、official
B、vernacular
C、legal
D、scientific
【正确答案】：A
【题目解析】：许多国家的标准语言，如标准英语、标准法语和普通话，也被指定为官方语言。