Answer:
Self-humbling.
Step-by-step explanation:
Self-humbling can be defined as an act of humbling oneself or serving others. In the verbal form of communication, self-humbling denotes modest talks, restraint, self-deprecation of one's performance.
In the given case, Ricardo is using the self-humbling form of verbal communication. It can be inferred as he is using modest talks, and self-deprecation when praised for his performance.
So, the correct answer is self-humbling.