Answer:
Correct answer is D It is an artificial transportation and trade route created to connect the Mediterranean Sea with the Red Sea.
Step-by-step explanation:
Option A is not correct answer as there are other routes, especially water route across Red Sea.
B is not correct as Iran and Egypt have no border.
C is not correct as this road is not connecting two continents.
D is correct as when the Canal was finished it connected two cities, which had no water connection until then. It was finished in the second half of 19th Century.