Hello! Can someone help me figure out how to tackle this question? Is there a key inference I likely missed in the diagram?

Thanks!

Could someone explain why A is the correct answer? I'm having trouble seeing how specifically "none" of the medical students began by testing the same diagnosis as other medical students. Couldn't it be that two medical students, one in error, provided the wrong diagnosis/test?

Can someone explain why B is incorrect?

Can someone explain why A is incorrect? Thanks!

I can see why C is correct, however I had trouble eliminating D and E. Can someone run why they eliminated?

Can someone clarify why E is incorrect and C is correct?

Could someone upload a diagram for this game?

Can someone show me where they found evidence for the correct answer choice A?

Can someone explain why answer choice A is incorrect?

How would one attack this question if you did not see the t/w inference?