number of subjects, age and sex of the subject, and length of the study... Just took the quiz(:
Answer:
The correct answer would be B. A compound :)
Chemical spills are types of pollution that is believed to
have the most impact in society. This event poisons the environment and kills
organisms instantaneously or sometimes at a slow rate in a given
geographic location on Earth. Irresponsible human activity is the cause of these spills and laws have already
been passed for its proper regulation.
