A circuit consists of a battery, a resistor R, and two light bulbs A and B as shown below:
[Figure: Circuit diagram showing battery, resistor R, and bulbs A and B in parallel]
If the filament in light bulb A burns out, then the following is true for light bulb B:
(a) It is turned off; (b) its brightness does not change;
(c) it gets dimmer; (d) it gets brighter.