When he is faced with a dilemma sometimes, he usually makes a/an decision by throwing a c

网友回答

(答案→)A. arbitrary
B. conservative
C. accurate
D. cautious
解析：进退两难的时候，靠抛硬币作出的决定是“随意”的。conservative: 保守的；accurate: 精确的；cautious: 谨慎的。不合题意。arbitrary: 随意的、随机的。故A项正确。