Which of the following are Europe's highest mountain chain and a lucrative tourist attraction?

a. Pyrenees

b. Alps

c. Central Uplands

d. Apennines

The single highest mountain in Europe is Elbrus, and it belongs to the Caucasus Mountains. However, it's outside of the main European tourist zone.

The highest mountain range are the Alps (in Austria, Switzerland, France and Italy) and they are a great tourist attraction; so they must be the correct answer.