Use the Following Information to Answer the Questions Below

Use the following information to answer the questions below.
You are investigating different live cells using a light microscope. The first cells you observe are part of a larger organism. They have a clear area in the middle, a defined shape, and you can see many greenish ovals pressed up along the outer edges.
-The clear area in the middle is most likely the

A) result of poor use of the microscope.
B) result of incomplete staining.
C) central vacuole.
D) nucleus.
E) plastid.