In geometry, a transversal is a line that passes through two lines in the same plane at two distinct points. In most cases there is only one but here there are two present. Transversals play a role in establishing whether two other lines in the Euclidean plane are parallel.
The answer is B because they are sharing the 2 sandwiches so since there is a total of 4 people, you would need to do 2 divided by 4. Hope this helped you. :)