Hello there! The answer is C) 2.42 for 12 oz. I got the answer because I did $1.26/6= $0.21($0.21 is the unit rate) and next I did $0.21*16(there are 16 oz in a pound)= 3.36. I did that for B and C and C was the least and it is better to pay cheap!
I hope I helped! :)