Final answer:
The 220-count offer would be a better buy because it has the lower unit price. Therefore, the correct option is B.
Step-by-step explanation:
To determine which offer is the better buy, we need to compare the unit prices of the two offers. To find the unit price, we divide the total cost of the pens by the number of pens. For the 150-count offer, the unit price is $7.49/150 = $0.0499 per pen. For the 220-count offer, the unit price is $9.99/220 = $0.0454 per pen.
Therefore, option B is correct. The 220-count offer would be a better buy because it has the lower unit price.