Answer:
D. A man and a woman ride the same bus to and from work every day but never speak to each other.
Explanation:
There is no clear conflict because there is no struggle. If the man and woman never talk to each other, thats all there is. Because the man and woman never interact, there is no conflict to be made. However, if the man were to one day accidentally drop coffee on the woman or if there was internal conflict like the woman wanted to talk to the man but was unsure, there would be conflict. But because there is no obstacle, there is no conflict.