Final answer:
History, specifically the practices around memorials and the personal effects of the deceased. Without clear historical context, it is not possible to answer definitively what was found in Spencer Cox's apartment, but generally such discoveries can include personal belongings that reflect their life and interests.
Step-by-step explanation:
Historical context surrounding the death of an individual, presumably Spencer Cox, and what was discovered by his friends while cleaning his apartment. However, without a clear context or reference to who Spencer Cox is and which period he belongs to, it is not possible to provide a historically accurate response. Traditionally, the discovery of personal items such as journals, manuscripts, or protest signs can offer insight into the person's life and beliefs. Tying this to the provided references, the discovery of flowers could symbolize rebirth or the cycle of life and death, aligning with historical practices such as those related to the Afterlife where flowers were commonly offered, as mentioned in the LibreTexts reference. Similarly, the mention of a faded bunch of flowers in the second reference provides a romantic or memorial connotation. The third reference also aligns with a historical context where personal effects are closely examined, though it does not link directly to Spencer Cox or the specific items listed in the initial question.