In 13th century hungary, the mongal invasions caused..
a. attacks from the ottoman turks
b. widespread destruction
c. a strong hungarian monarchy
d. the spread of roman catholicism

I would say that the best answer here is B. A widespread destruction.

Perhaps another consequence is a change in building habits in Hungary: the castles after the invasion were made more sturdy

Ps. The Ottomans came only around 16th century

Yes, they are always very triggered