Which One of the Following Best Describes Shaping

Which one of the following best describes shaping?

A) Reinforcement becomes increasingly stronger over time.
B) Reinforcement is weaned away over time, until a student is doing something without being reinforced.
C) The behaviour being reinforced changes over time so that it increasingly resembles the desired terminal behaviour.
D) Praise is the only reinforcer used, and the specific things that are said to a student change as the student improves.