The purpose of this passage is to ______.

A．an educated person would be expected to know most technical terms
B．everyone is interested in scientific findings
C．the average man often uses in his own vocabulary what was once technical language not meant for him
D．various professions and occupations often interchange their dialects and jargon

A．Baseball, football and basketball are popular sports in America.
B．Pizza, hot pastrami, and chow mein are popular diet in America.
C．There is no variation in using the American calendar.
D．There is no variation in using the American language.