(this abbreviated explanation has been moved from another thread)
Q24
(A) "inaccurate information?" no.
(B) national = personal? yes! this is the whole idea of the passage, that studies in personal psychology are of interest to those studying governments. Governments and people are used interchangeably throughout the passage.
(C) "new method of predicting conflict?" no.
(D) "rational decision-making has severe consequences?!" no!
(E) nope -- this is not contrary to the previous assumptions.