What is the meaning of "Actus Reus"?

a.

The mental element of a crime, often referred to as the "guilty mind"

b.

The name of criminal procedures adopted by officials in France

c.

The actions that constitute a crime, often referred to as the "guilty act"

d.

The latin phrase meaning "Don't persecute twice for the same offence"

e.

A phrase used to suggest that Australia had no inhabitants in 1788