Question

What important temperatures does the Celsius scale use for a basis?

A) the boiling and freezing point of water
B) temperatures on the sun and the moon
C) the rang of human body temperatures
D) high and low air temperatures

Answer 1

I would think A, but I am not 100% sure.

Answer 2

I think:
A) the boiling and freezing point of water 
Because the freezing point is taken as 0 degrees Celsius and the boiling point as 100 degrees Celsius.