I would believe the conclusion or the plot. I'm not certain so I could be wrong.
Answer:
1. Opus - a separate composition or set of compositions by a particular composer, usually ordered by date of publication.
2. The 6 musical periods are classified as Medieval, Renaissance, Baroque, Classical, Romantic, and 20th/21st Century, with each fitting into an approximate time frame.
3. Baroque music
Explanation:
I believe that the MOST reasonable answer would be A.) never use daffodils with other flowers in arrangements. If they are harmful to other plants it would be best to just keep them seperate, and the rest of the other options just seem unreasonable and too much work just for something so simple :P