He is c. El dentista, since they're talking about someone who takes care of the client's teeth, so this means he is is the dentist (el dentista).
Good luck!
D. si, fui y vi muchas cosas bellas
The subjunctive mood is used to talk about desires, doubts, wishes, conjectures, and possibilities.
The indicative mood is used to talk about facts and other statements that are believed to be true and concrete.
The imperative mood is used to give commands.
El estado de ánimo subjuntivo se usa para hablar de deseos, dudas, deseos, conjeturas y posibilidades. el estado de ánimo indicativo se usa para hablar sobre hechos y otras declaraciones que se consideran verdaderas y concretas el estado de ánimo imperativo se usa para dar órdenes.
Option D is the correct option