The study on Pseudomonas is so _that it leaves no part of the life cycle of this notorious pathogen.

Explanation

Correct Answer: A. comprehensive Explanation: The sentence suggests that the study on Pseudomonas is thorough and complete, leaving no part of its life cycle unexplored. Why other options are not correct: - B. haphazard: Haphazard means lacking order, and it does not fit the context of a comprehensive study. - C. sporadic: Sporadic means occurring at irregular intervals, which is not suitable for a thorough study. - D. prolific: Prolific means producing a lot, but it doesn't convey the thoroughness of the study. - E. clean: Clean does not capture the depth and completeness of the study.