An amusement park roller coaster includes five cars, numbered 1 through 5 from front to back. Each car accommodates up to two riders, seated side by side. Six people — Tom, Gwen, Laurie, Mark, Paul and Jack — are riding the coaster at the same time.
Laurie is sharing a car.
Mark is not sharing a car and is seated immediately behind an empty car.
Tom is not sharing a car with either Gwen or Paul.
Gwen is riding in either the third or fourth car.
Which of the following groups of riders could occupy the second car? . (A) Laurie only (B) Tom and Gwen (C) Laurie and Mark (D) Jack and Tom (E) Jack, Gwen, and Paul