D is correct answer.
Sword Excalibur it was forged by Merlin.
Hope it helped you.
-Charlie
Galileo's problem was that he was trying to teach people science which was in conflict with what the church preached. When he started questioning the church and providing scientific results the people started questioning as well which did not bode well for the church. The conflict got resolved with him abandoning his research and living a quite secluded life until he died.
