Read the following information carefully and answer the question based on that.
Two families are planning to go on a canoe trip together. The families consist of the following people: Robert and Mary Henderson and their three sons Tommy, Don and William, Jerome and Ellen Penick and their two daughters Kate and Susan.
There will be three canoes with three people in each canoe. At least one of the four parents must be in each canoe. At least one person from each family must be in each canoe.
If each of the Henderson children rides in a different canoe, which of the following must be true?
- The Penick children do not ride together.
- The Penick parents do not ride together.
- The Henderson parents do not ride together.
- Only I
- Only II
- I and II
- I and III