You Insert a Microelectrode into the Axon of a Neuron

You insert a microelectrode into the axon of a neuron and inject positive current while also measuring the membrane potential at a distance of TWO length constants from the site of current injection.If the neuron's potential crosses its threshold,this voltage measurement will be

A) 1/3 of the value at the injection site.
B) 2/3 of the value at the injection site.
C) 1/9 of the value at the injection site.
D) the same as the value at the injection site.