The Cordays and Bell combined the "hospital soap" idea with the tradition of centering a series on a family, by making the show about a family of doctors, including one who worked in a mental hospital.[22] Storylines in the show follow the lives of middle- and upper-class professionals in Salem, a middle-America town, with the usual threads of love, marriage, divorce, and family life, plus the medical story lines and character studies of individuals with psychological problems.[23] Former executive producer Al Rabin took pride in the characters' passion, saying that the characters were not shy about "sharing what's in their gut."[24]
I think it's D. Their music was kept simple. Hope this helps!
A square had 4 edges in total

TOPIC:- PASSIVE VOICE
QUESTION:- He was painting a portrait.
ANSWER:- A portrait was being painted by him
RULES FOR FORMATION:-
1. Change the object into subject.
2. use 3rd form of verb .
3. use by and then use subect as object.
HOPE IT HELPES YOU.