Correct Answer (Detailed Explanation is Below)
A.
Antonie van Leeuwenhoek
Detailed Explanation
Antonie van Leeuwenhoek is commonly known as the father of microbiology because of his pioneering observations of microorganisms. He constructed high-quality simple microscopes and observed bacteria, protozoa and other microscopic forms. His discoveries helped establish the study of microorganisms as an important scientific field.