A Languages vary, however, these variations meet only the surface of the language levels, such as the level of lexicon.
B Language change is a progressive, complex, long and regular process that may happen at all language levels.
C Language change is a conscious process, so it can be prevented by its speakers through the exclusive use of standards.
D Languages not only change but evolve, for their linguistic community also evolve alongside the historical and cultural events.
E Language change and language evolution are synonyms and are used interchangeably to describe the same phenomenon since languages change because they evolve and vice-versa