Final answer:
Option 2) The incident proves that accidents can happen to even the most experienced experts.
Step-by-step explanation:
The response that best shows an understanding of the text supported by evidence is option 2) The incident proves that accidents can happen to even the most experienced experts.
In the given text, it is mentioned that the actions at Lexington and Concord were accidents, which sparked a war. It also states that General Gage, in his attempt to prevent a war, helped to cause one. This supports the idea that accidents can happen to anyone, even experienced experts like General Gage.