What is the difference between A-weighted and C-weighted acoustic measurements?

What is the difference between A-weighted and C-weighted acoustic measurements?

A.
A-weightedis the ambient sound pressure level; C-weighted is the calculated sound pressure
level

B.
A-weighted is the sound a human car hear;C-weighted includes the levels out of the
humanbearing range.

C.
A-weighted is the average dB of a certain area;C-weighted is a single measurement.

D.
A-weighted is the average dB of a certain area; C-weighted is a combined total measurement.