What are four unique aspects of the client-practitioner relationship that differs from other relationships a client may have?

Possibly: They must keep what they learn confidential.

Even when no client-practitioner relationship ensues, a practitioner who has learned information from a prospective client shall not use or reveal that information.

depends on your school

when i was in high school i took ap biology my senior year and it was the hardest one for me because my teacher finished the material within the first month of school and then went on to doing advanced college level it was horrible. but at a nearby school ap biology was one of the easier aps. also, it depends on what you are interested i like math a lot so ap calculus was easier for me than most but i hate history so ap us government was harder for me than most.