Your answer is C. You're welcome ;)
To find a unit rate, you should set the original unit to 1 and account for the other value appropriately. In this case, you would divide both sides by 5, which reveals that at a rate of $7.96 for 5 pounds, it is $1.59 per pound.
Expression A gives the correct probability.
On the first draw, there is a 4/12 chance of choosing a boiled egg because there are 4 boiled eggs and a total of 12 eggs to choose from.
On the second draw, there is a 3/11 chance of choosing a boiled egg because there are 3 boiled eggs and a total of 11 eggs to choose from.
