Question

which of these events resulted in further crusades one hundred years after the first crusade?
in 732, muslims invaded the frankish kingdom.
in 1093, muslim turks attempted to conquer byzantine.
in 1187, muslim forces retook the city of jerusalem.
in the 1200s, mongol invaders reached muslim lands.

Explanation:

The First Crusade was in 1095 - 1099. One hundred years later would be around 1195 - 1199. The event of Muslim forces re - taking Jerusalem in 1187 (close to the 100 - year mark) led to further Crusades (the Third Crusade). The invasion of the Frankish Kingdom in 732 was long before the First Crusade. The Muslim Turk attempt to conquer Byzantine in 1093 was just before the First Crusade. The Mongol invaders in the 1200s were after the time frame we are considering.

Answer:

In 1187, Muslim forces retook the city of Jerusalem.