Which of the Following Is an Example of an Observation

Multiple Choice

Which of the following is an example of an observation?

A) Gases expand as their temperature increases because the gas molecules are moving more rapidly.
B) Paraffin wax begins to melt at 57°C.
C) Three samples of wax are heated to 75°C.
D) The force acting on an object is equal to its mass times its acceleration.
E) Will all waxes melt at the same temperature?