Answer:
B) Gets smaller
Explanation:
The difference of phase between current and voltage in a AC circuit is the phase  angle and it depends on the value of Z ( circuit impedance)
Z = R + X  where R is the resistive component and X the reactance component, which is due either to a presence of an  inductor or a capacitor. In any case the total impedance depends on R the resistive, and the phase angle Ï is: Â
tanâ»Âč Ï =  X/R
Have a look to a pure capactive circuit (we are talking about AC current) in this case current leads voltage by 90â°. If we add a resistor in the circuit  the current still will lead a voltage but in this condition the phase angle will be smaller,
If  R increase, X/R  decrease and tanâ»Âč Ï also decrease