One example of a recent technological advancement that is helping people to overcome a physical boundary is __________.
A.
a tunnel for a high speed train underneath the Alps
B.
a bridge for a high speed train crossing over the Nile River
C.
a luxury cruise ship that travels from Mexico to Japan
D.
a steam-powered train that travels across the Rocky Mountains
Answer:
a. A tunnel for a high speed train underneath the Alps
Explanation:
This high speed train connects modern North and South Europe with a railway. It helps the environment, as people are more likely to use it instead of cars. It keeps the Alps intact, as it runs underneath the Alps.