An Air Parcel Is Considered $\underline {\text { unstable }}$ When It
A) Either Remains as It Is, or Changes

Multiple Choice

An air parcel is considered $\underline {\text { unstable }}$ when it

A) either remains as it is, or changes its initial position.
B) continues to rise until it reaches an altitude at which the surrounding air has a similar density.
C) resists displacement upward.
D) ceases to ascend.