Absolute zero is a. the temperature at which the motion of particles theoretically ceases. b. defined as 0°c. c. the triple point for water. d. all of the above

A. the temperature at which the motion of particles theoretically ceases.

Explanation:

Absolute zero is the same as 0 K (or zero Kelvin). At this point, the temperature cannot get any lower, and it is incredible difficult to get something to this low low temperature. The particles theoretically stop moving at 0 Kelvin aka absolute zero.

i think that the answer is c