Which statement best distinguishes an observation from an inference?

An inference is likely to change based on additional observations.
An observation is likely to change based on additional inferences.
An observation involves assumptions, but an inference does not.
An inference involves the senses, but an observation does not.

An inference is likely to change based on additional observations.

The statement that best distinguishes an observation from an inference is:

An inference is likely to change based on additional observations.