THE AUTHOR DISCUSSES THE GEOLOGICAL OBSTACLE IN PARAGRAPH 4 IN ORDE...

6. The author discusses the geological obstacle in paragraph 4 in order to A. note the natural beauty of Panama, which was destroyed by the canal's construction B. suggest that the workers had to spend a lot of time and effort on reconstruction C. contrast the geological issues with the oceanic ones the engineers of the project faced D. show how landslides were more of a problem for the French than they were for the Americans.