Question

Which of the following best describes how languages behave over time?
a. languages change too frequently for new words to become accepted as normal.
b. over time, any given word can disappear from a language or acquire a new meaning.
c. if everyone agrees on what a word means today, it will always mean the same thing.
d. within a single language, words often change, but it is rare for any word to cross from one language to another.

Answer 1

I would say a. Think about the fact that the word gay used to mean happy. Now it means  something else :D

Answer 2

The answer is B; Over time, any given word can disappear from a language or acquire a new meaning