A 35-Year-Old Male Presents to the ER with a Laceration

A 35-year-old male presents to the ER with a laceration on his left hand. The patient reports an hour ago he was working on renovations in his 1945 home, when an old board fell and injured his hand. The laceration is approximately 3 inches long and moderately deep. It appears that the cut was bleeding heavily, but he has stopped the bleeding by holding pressure on the site with an old t-shirt.
-Which line(s) of defense has been breached for this injury? 

A) First line of defense
B) Second line of defense
C) First and second lines of defense
D) First,second and third lines of defense