hello i need help again i think its b im not so sure can someone help

Answer:
Yes, you're right it's B. 1 11/12 hours is the right answer
Step-by-step explanation:
We take Video 1 which is 4 3/4 deduct with video 3 which is 2 5/6, and 4 3/4 - 2 5/6 = 1 11/12