3. Why is the Suez Canal so important? * A The Canal is the only way to get from Africa to Asia
B It connects the countries of Egypt to Iran allowing for massive migration between
the two countries
C The Canal replaced the Silk Road as the main way for products to go from Asia to
North America
D It is an artificial transportation and trade route created to connect the
Mediterranean Sea with the Red Sea

Correct answer is D It is an artificial transportation and trade route created to connect the  Mediterranean Sea with the Red Sea.

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.