Task: Question Answering
Input (English): Question: The population of locusts in a certain swarm doubles every two hours. If 4 hours ago there were 1,000 locusts in the swarm, in approximately how many hours will the swarm population exceed 128,000 locusts?

 Option A: 12

 Option B: 8

 Option C: 4

 Option D: 10

 Option E: 16
Output (English): Option D