Which of the following sentences contains a run-on sentence？

Which of the following sentences contains a run-on sentence？
A.Marcellino always knew his way around the woods this is something he could always depend on.
B.We are what we eat.
C.He is a man who can always keep his promise
D.all of the above
正确答案：Marcellino always knew his way around the woods this is something he could always depend on.