Final answer:
Option (c), C-reactive protein (CRP) is a marker of inflammation and its levels rise in the blood due to a variety of conditions, including infections and chronic diseases.
Step-by-step explanation:
The student has asked about C-reactive protein (CRP), which is a substance produced by the liver that increases in level in response to inflammation. Among the options provided, the correct answer is c. Is a marker of inflammation.
CRP levels in the blood rise in response to inflammation, which can be due to a variety of conditions, including infections and chronic diseases. It is not produced by T cells, it is not an enzyme involved in digestion, and while it can interact with the complement system, it is not considered a component of it.