A light bulb rated at 100 W is twice as bright as a bulb rated at 50 W when both are connected in parallel directly to a 100-V source. Now imagine that these bulbs are instead connected in series with each other. Which is brighter, and by how much?\nA. The bulbs have the same brightness.\nB. The 100-W bulb is twice as bright.\nC. The 50-W bulb is twice as bright.\nD. The 100-W bulb is four times as bright.