Final answer:
During the sale, the scooter will cost $200.
Step-by-step explanation:
To calculate the price of a scooter during the sale, we need to find 1/3 of the original price and subtract it from the original price. So, 1/3 of $300 is $300 / 3 = $100. Now subtract $100 from $300: $300 - $100 = $200.
Therefore, the scooter will cost $200 during the sale. So, the correct answer is a) $200.