The answer would be D the year the source was published.
In your introduction, you have to clearly identifiy the experience you are about to relate?
Is an example of a compound noun
1. Should've Studied (I think?)
2. Stayed
3. Helped
4. Forgot
5. Shouldn't have Spoke
6. Said
Where are the statements, can you upload a picture of the statement so that I can answer your question