Final answer:
Tammy paid 35% of the regular price for the item after receiving a 65% discount off the regular price, which corresponds to option B.
Step-by-step explanation:
The question posed is, "Tammy bought an item at a discount of 65% off the regular price. How much did Tammy pay?" To calculate this, we subtract the discount percentage from 100% to determine what percentage of the regular price she will pay. Since the regular price is considered 100%, with a 65% discount, we do the following calculation:
Therefore, Tammy paid 35% of the regular price for the item, which corresponds to option B.