so, B was kinda wrong and C was the answer even though there are expert verified answers, why was it C?

true tan speed = ang vel x radius

this is poiselle's equation from fluid mechanic in physics. mech eng

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.