Which of the following was a significant challenge in building the Panama Canal? Mosquitoes spread diseases to workers Engineering plans were often wrong Workers went on strike to get extra pay Congress did not provide enough money

## Step 1<br />The Panama Canal was a monumental engineering project that faced numerous challenges. The primary challenge was the spread of diseases by mosquitoes, which caused a significant number of deaths among the workers. This was due to the tropical diseases such as malaria and yellow fever, which were prevalent in the region.<br /><br />## Step 2<br />The other options, such as engineering plans being often wrong, workers going on strike to get extra pay, and Congress not providing enough money, were indeed challenges faced during the construction of the Panama Canal. However, these challenges were not as significant as the disease outbreak caused by mosquitoes.