How does this excerpt prove that Odysseus causes his crew's demise?

The correct answer for this question is this one: "D. by revealing his ignorant assumptions." The excerpt prove that Odysseus causes his crew’s demise by revealing his ignorant assumptions. Odysseus challenges the Cyclops by threatening revenge.

Here are the following choices:

A. by explaining his haphazard travels

B. by describing his loyalty to Zeus

C. by showing his physical weakness

D. by revealing his ignorant assumptions