Final answer:
Silver impregnation is the best stain to visualize reticular fibers under a microscope.
Step-by-step explanation:
The correct answer to the question 'Which of the following would be best suited to visualize reticular fibers?' is d. Silver impregnation. Reticular fibers are very thin and delicate fibers made of collagen and have a net-like appearance. Silver impregnation staining is a technique that uses silver salts to enhance the visibility of these fibers under a microscope by depositing metallic silver on them. This staining method is specifically designed to highlight reticular fibers and is commonly used in histology and pathology research.