The answer is D, 300 minutes.
Talking is 1/3 which is 0.33 as a decimal. I multiplied 0.33 by 15 hours and got 5 hours. To convert the 5 hours talking into minutes, I multiplied 5 by 60 (60 minutes in 1 hour).
(Please mark this answer as Brainliest and leave a Thanks if I helped you!)