To find the number of pounds of added sugar he could eat in a year, we need to determine 9% of his total food intake.
9% of 1,500 pounds = (9/100) * 1,500 pounds = 0.09 * 1,500 pounds = 135 pounds.
Therefore, Lukas could eat 135 pounds of added sugar in a year.
The answer is B. 135 lb.