What industry is one of west central europe’s largest and most important industries?
a. skiing
b. subsistence farming
c. tourism
d. book publishing?

The industry that became one of West Central Europe’s largest and most important industries is: C. tourism

Countries in west central Europe region (such as Slavic countries, Germany, Austria, and Luxembourg) are scored the highest in the world in term of General happiness.
So many people are interested to see these countries and the culture around it, which increase their tourism activities