I'll give you a question, please answer with step-by-step reasoning process. James had difficult beginning work, but once it did he didn't stop. He worked best when he had what?\nOptions:\n- panic\n- stress\n- anxiety\n- accomplishing\n- momentum

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Momentum is the force which keeps something going on. People work the best when they gain the force to keep things going.
The answer: momentum.
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