Final answer:
Tony and Doc have a mentor and mentee relationship in West Side Story. As the owner of the corner store and Tony's employer, Doc serves as a source of wisdom and guidance, seeking to help him avoid the dangers of gang life.
Step-by-step explanation:
In West Side Story, the relationship between Tony and Doc can be characterized as that of mentor and mentee (D). Doc is the owner of the corner store where Tony works and serves as a voice of wisdom and guidance in Tony's life. Doc's store is neutral territory for the gangs, and throughout the musical, he tries to impart life lessons and advice to the younger generation.
Doc is clearly concerned about Tony and the life he leads, and sees the potential for something better. This is most evident in scenes where Doc attempts to deter Tony from the gang life and the looming violence between the Jets and the Sharks. Thus, while they are not related by blood, their relationship is akin to that of a fatherly figure trying to steer his mentee towards a better path.