In a Classroom on the First Spaceship to an Extrasolar $\lambda$

Multiple Choice

In a classroom on the first spaceship to an extrasolar planet--there are children because the trip will take 200 years--a teacher is showing charge Q uniformly distributed along a conducting rod of length L₀ to produce linear charge density $\lambda$ ₀.As observed on Pluto when the spaceship passes it at 0.800 c,the linear charge density $\lambda ^ { \prime }$ is

A) 0.360 $\lambda$ ₀.
B) 0.600 $\lambda$ ₀.
C) 0.800 $\lambda$ ₀.
D) 1.00 $\lambda$ ₀.
E) 1.67 $\lambda$ ₀.