Can someone explain when the test makers expect me to see that two sentences paraphrase and become equivalent? (i.e. in this problem, "fall behind in the international arms race" = "wind up in a strategically disadvantageous position" and "maintain value system and way of li...

Hi, I'm still having trouble understanding why C is incorrect. If the physical structures and functions of consciousness are currently unknown, wouldn't physical theory be unable to explain it? Since physical theory relies on knowing the physical structures and physical functions of something.