Answer:
D) reveal details that are otherwise not easily seen
Step-by-step explanation:
The most common reason for staining a specimen is reveal details that are otherwise not easily seen.
Some details might not easily be visible when using the microscope without staining the specimen in view. The color added to the specimen help to bring out otherwise hidden parts of the specimen in full view.
Stains helps to highlight the features of the specimen and bring them into full view.