Of All Four Muons Produced at 15 Km Aboveground and Schematically

Multiple Choice

Of all four muons produced at 15 km aboveground and schematically shown in the figure below, which one would "see" the distance to the ground as a mere 200 m?

A) the muon moving at 0.9c
B) the muon moving at 0.99c
C) the muon moving at 0.999c
D) the muon moving at 0.9999c
E) The muons would not experience any relativistic effect because they are too tiny.