Answer:
C. sunk cost bias
Step-by-step explanation:
Sunk cost bias can be better explained by a regular everyday situation: probably your mother (or sister, or aunt) bought a pair of shoes that she loves because they are gorgeous and expensive. Women have a tendency to self impose torture when it comes to gorgeous and expensive shoes, since they will insist on using them even if their feet are constantly in pain. When you ask them why they do it, they will always answer that she likes them so much and they were so expensive, that she has to wear them.
This same logic applies to stubborn managers that know that they are making a bad (or not so good decision), but since they already made a bad decision before, they will stick to their prior choice no matter what.