The answer is D. Multiply the number of times Tristan swam around the lake by the distance to get the total distance that Tristan swam. If he swam 1/4 a mile 8 times, then he swam 2 miles. Since it takes Tristan an hour to finish one mile and he swam 2 miles, you need to multiple 60 minutes by 2 to get the time Tristan took to swim. I hope that this was helpful and if so please leave a good rating and thanks and maybe even Brainliest answer. Thank you and have a good day!