Name the vacant path that a saw leaves going through wood

You'd have to give me options to choose from before i can answer you.

The answer is ink because it has to soke in the paper so i believe the answer is b.ink 

A  documentary film  is a nonfictional motion picture intended to document some aspect of reality, primarily for the purposes of instruction, education, or maintaining a historical record.example:     20,000 days on earth

Need the reasons to solve