There are three possible explanations for the contradiction of the assumption of large-package purchase: transportation, ______ limitations.

A．She’ll go to visit her aunt.
B．She has an important appointment with a friend she has not seen for years.
C．She thinks the traffic in New York is heavy on weekdays.
D．She’ll have a visitor.

A．Collecting objects on the beach.
B．Creating models of different shapes.
C．Mapping currents in the ocean.
D．Tracking water pollution.