In bright-field microscopya. there is no contrast between the specimen and the medium. b. the specimen absorbs light and appears dark. c. any subcellular structure may be observed. d. the specimen reflects light and appears light.

b

Explanation:

In bright-field microscopya, the specimen absorbs light and appears dark, however the background is bright. It is one of the simplest techniques used to illuminate specimen under microscope A typical bright-field microscopya, is a dark sample on a bright background. Hence, the name bright-field microscopya.