A Single Bar of Soap Has a Small Light Attached

Multiple Choice

A single bar of soap has a small light attached. The bar is released in a river and a snapshot is taken every second from a blimp which is stationary over the river. The snapshots are all
Superimposed on one large picture. The line formed by connecting the dots is:

A) A streamline
B) A streakline
C) A pathline
D) A line that has not been defined