Which observation have scientists used to support Einstein’s general theory of relativity?
A. The orbital path of Mercury around the Sun has changed.
B. GPS clocks function at the same rate on both Earth and in space.
C. The Sun has gotten more massive over time.
D. Objects act differently in a gravity field than in an accelerating reference frame.

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.

305.7

explanation:

density =m/v

density =917/3.00

density = 305.

approximately = 305.7

in four significant figures