Answer:
D. Parallel
Step-by-step explanation:
When bulbs are arranged in parallel, they draw more current, because the full voltage passes through each of the three bulbs, which means more current will be drawn by each of the bulbs.
For the bulbs arranged in series, the same current (which is one-third of the supplied current will pass through each of them)
Since the bulbs arranged in parallel draws more current from the battery, they will run out the battery faster.
The parallel connection will run out the battery faster