Final answer:
To find the number of cups of pecans needed, subtract 1/2 cup from the 1 cup of raisins.
Step-by-step explanation:
To find the number of cups of pecans needed, we need to determine the difference between the amount of pecans and raisins. Since the recipe requires 1/2 cup less pecans than raisins, we subtract 1/2 cup from the 1 cup of raisins. The answer is:
1 cup - 1/2 cup = 1/2 cup
Therefore, option A) 1/2 cup is the correct answer.