C. The auther uses humor to decide the issue for themselves.
long, red, black should be the adjectives
Research is a scientific investigation which follows a procedure of observing, hypothesizing, testing, analysing and presenting the data.Variables are contained in every research because they serve as the objects to be observed or the result of those observationsWe appreciate your questions. Please, never hesitate to ask more in Brainly your queries.
Revision involves clarifying purpose and meaning.
All other choices would be incorrect because they are a part of the process of editing.