A. Detailed analysis of the nutrients from typical kitchen waste
You can approach this problem using process of elimination:
Answer D is about producing home vegetables, not kitchen waste, so we can cross that one out.
Answer C is personal testimony, so it is not applicable to a research paper (which should be based on research).
Answer B seems possible, but it is really describing an instruction manual, not research, so it is also not applicable.
Research papers should be based on research, so using a detailed analysis about a topic relevant to the overall essay is a good source to use.