Passage Summary: If computers can eventually give us the same quality of safety data as smashing real cars, companies will switch to computers because they are way cheaper.

Conclusion: Car makers will reduce the number of real-life crash tests if computer simulations become just as reliable.

Reasoning: Computer simulations are significantly less expensive to design and run than physical crash tests.

Analysis: The argument relies on the assumption that cost and reliability are the primary factors driving the choice between simulations and real tests. To strengthen this, we should look for an answer that reinforces the idea that manufacturers are motivated by these specific factors or eliminates other reasons they might stick with real crashes. For example, if there were a law requiring real crashes regardless of computer quality, the conclusion would fail. Look for an answer that confirms that if the 'reliability' hurdle is cleared, the 'cost' benefit will be the deciding factor.