To answer this question, we need to understand the meaning of the word "carnal."
Option A) Serious - This option is incorrect because "carnal" does not mean serious. The word "carnal" refers to something related to the physical or sensual desires of the body.
Option B) Bitterness of speech and temper - This option is incorrect because "carnal" does not mean bitterness of speech and temper. The word "carnal" does not specifically relate to negative emotions or attitudes.
Option C) Fleshly - This option is correct because "carnal" means related to the flesh or physical desires. It refers to something that is sensual or concerned with physical pleasure.
Therefore, the correct answer is C) fleshly. This option accurately describes the meaning of the word "carnal."