There is no period at the end of the sentence
His determination is best illustrated in c
The correct answer is slow and steady wins the race
These two are similar because they both mean that if you are patient and have will that you can achieve anything. It's like the story of the rabbit and the tortoise.
The concept that Abraham is demonstrating is Code switching. Code switching involves adjusting one's style of speech, appearance, behavior, or expression in ways that will optimize the comfort of others in exchange for fair treatment, quality service, and employment opportunities.
Simply put, code switching when someone changes their language based on who they are with, typically to fit in better with a different group.