The electric field 0.400 m from a very long uniform line of charge is 840 NC. How much charge is contained in a 2.00 cm section of the line?
a) 2.4 × 10-9 C
b) 4.2 × 10-9 C
c) 8.4 × 10-9 C
d) 1.6 × 10-9 C