Kim Is a Salesperson Who Has Learned to Gauge Her

Kim is a salesperson who has learned to gauge her customers' interest from their eyes. Which of the following is most likely to indicate that her customer is carefully considering her product?

A) small, constricted pupils in the eyes
B) an abrupt look away by the eyes
C) a rapid sideways movement of the eyes
D) a lengthy sideways movement of the eyes
E) fast blinking of the eyes