We drove to the nearby Blue Ridge Parkway where we found a trail that wrapped around a lake . As we walked , we debated man 's capacity to change himself . Later , the girls watched movies , and the guys continued the ping pong wars while watching football .

Choices:
1). How men can change .;
2). How ping pong is played .;
3). How girls treat each other .;
4). How wars are fought .;
Q: What was the topic of conversation on the walk ?
1).