In recent years, there has been a marked increase in the number of technical terms in the terminology of______.

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

A．never last long
B．should be confined to scientific fields
C．may become part of common speech
D．are considered artificial language speech