The detail that best explains why building the first bridge to cross the gorge is such a difficult task is:
<u>“Even at the narrowest spot, the gorge was eight hundred feet wide.”</u>
According to the given question, the people of a city realized that there was a need to build a gorge of the Niagara Falls that would transport tourists into their city.
However, they found out that building a bridge would be a more difficult task than they first thought because of how wide the gorge was
A gorge is a narrow valley on a body of water that usually has rocky boundaries.
Therefore, the correct answer is option D because they realized just how wide even the narrowest spot at the gorge was.
