All Organisms That Have Ever Lived-Every Animal and Plant, Every

All organisms that have ever lived-every animal and plant, every bacteria and all fungi, every creeping thing, and all readers of this book-can look back at their ancestors and make the following proud claim: not a single one of our ancestors died in infancy. They all reached adulthood, and every single one was capable of finding at least one heterosexual partner and of successfully copulating. (Richard Dawkins, River Out of Eden)
This passage exemplifies a(n) _____.

A) conditional statement
B) argument
C) report or unsupported assertion
D) illustration
E) explanation