Which of Following People Can Be Classified as Frictionally Unemployed

Which of following people can be classified as frictionally unemployed?

A) Tex, who has returned to a full-time MBA program so that he can improve his earning potential
B) Dorothea, who is training to be a pilot but is currently working part-time as an Uber driver
C) Nancy, who is currently unemployed, lives in a town where telecommunications are poor, and cannot find proper information on available jobs
D) Brandon, who has no idea what career he wants to follow and has no working experience