11. The main purpose of the passage is lo:

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation

The article is mainly explaining that Panama Railroad is a very great project that embodies the superb craftsmanship and resilience of human beings. It also "appears to have cost more in dollars and in human life than any railroad" (lines 37 -39). The first natural paragraph "of all the world's wonders none could surpass this one as a demonstration of man's capacity to do great things against impossible odds" can also correspond to A's puzzling and impressive.