Which of the following is an example of the sunk cost fallacy?

Group of answer choices

$$I$\text{'}$m going to buy another bag of popcorn because this popcorn is burnt.$$

$$I paid $$85$ for this wool sweater, but it is too scratchy on my skin, so I think I'll give it to my mother$-$in$-$law.$$

$$I will not buy an Under Armour hoodie until it goes on sale for at least $25\%$ off.$$

$$I$\text{'}$m not going to allow the sacrifice of $2,527$ troops who have died in Iraq to be in vain by pulling out before the job is done.$$