Can help please will give brainliest

Which of the following statements best describes the concept behind labor unions?

What do all of the romance languages have in common? a) they are all widely used in the middle east and southeast asia. b) they can all trace their origins back to the latin alphabet and language. c) they can all trace their origins back to the egyptian alphabet and language. d) they can all trace their origins back to the sumerian alphabet and language.

The greatest integer function, shown below, is defined to be the greatest less than or equal to x. f(x) = [[x]]