The correct answer is: B. multiplies the value of inductance by two.
Inductance is a measure of how much an inductor resists changes in current. The inductance of an inductor is proportional to the number of turns of wire in the inductor. Doubling the number of turns of wire in an inductor doubles the inductance.
Option A is incorrect because doubling the number of turns of wire in an inductor increases the inductance, not decreases it.
Option C is incorrect because doubling the number of turns of wire in an inductor multiplies the inductance by two, not four.
Option D is incorrect because doubling the number of turns of wire in an inductor increases the inductance, not decreases it.
Option E
is incorrect because doubling the number of turns of wire in an inductor does affect the inductance.