Final answer:
Jargon consists of technical language and acronyms used by specific professional or social groups, which is distinct from slang, dialect, and vernacular. Jargon is the correct answer for the language usage described in the question. option a.
Step-by-step explanation:
The text mentioned in the question describes a specific type of language usage that includes technical language and acronyms as well as recognized words with specialized meanings within specific organizations or social groups. The correct term for this is jargon. Jargon is often used by experts in various professional fields to communicate complex ideas efficiently among themselves, yet it can be incomprehensible to outsiders. It contrasts with slang, which is informal language used among peer groups, and dialect or vernacular, which refer to language variations associated with particular geographical regions or social groups.
English dialects are distinct versions of the language, each with unique grammar, vocabulary, and pronunciation that set them apart. A dialect may be classified as either standard or nonstandard, with standard dialect generally being perceived as the norm for formal communication and education. In contrast, vernaculars, which can often be synonymous with nonstandard dialects, represent the distinctive language of social categories such as ethnic groups, age cohorts, or genders. It is crucial to recognize that all these linguistic forms, no matter how less standardized or formal they might be, have their own set of rules and structures.