Which of the Following Statements Include All the Essential Elements

Which of the following statements include all the essential elements of Newton's first law?

A) A body persists in its state of uniform motion in a straight line as long as the net external force remains constant.
B) A body persists in its state of rest as long as the net external force remains constant.
C) A body at rest persists in its state of rest unless acted on by a non-zero net external force.
D) A body persists in its state of rest or uniform motion in a straight line unless acted on by a non-zero net external force.