Which statement best completes the diagram showing the events of the First Crusade? Pope Urban 11 calls for the First Crusade European knights defeat Seljuk forces ? A. Muslims launch attacks against Christians in Europe. B. European crusaders steal goods from the city of Constantinople. C. Salah ad-Din stops Richard the Lionheart's invasion of Jerusalem. D. Europeans capture Jerusalem from Muslim forces.

Correct answer is  D. Europeans capture Jerusalem from Muslim forces.

Explanation:

Option A is not correct as during the Crusades Muslims didn't organized counter offensives against Christians in Europe.

B is not correct as this happened during the 4th Crusade.

C is not correct as this happened during the 3rd Crusade.

Last option is correct as Crusades captured Jerusalem and other major cities in the Holy Land, thus establishing Crusade states.

i would say b. research typically uses a variety of sources