Liang Said to Cara, "I Think That the Bigfoot Creature

Liang said to Cara, "I think that the Bigfoot creature exists because scientists have not been able to show that it does not exist. Therefore, it most likely does exist." What thinking error or problem in reasoning is Liang showing?

A) Not providing a reason in support of the claim
B) Not making the claim known
C) Failing to make come to a conclusion
D) Arguing from possibility or ignorance