请教：KAPLAN填空题

markfu1022UID: 2306081

07版KAPLAN里面PRACTICE TEST ONE，SECTION 2第六题：

6 X8 R9 H0 k% J* ]2 sEven though the FBI agent's attempts to uncover an outlandish alien conspiracy were____, he was still____by the severe reprimand he received from his superiors.

+ N& ]3 i  `- P) T  D- n$ WA. obstinate...elated
2 [  j# T7 z5 V/ B6 H, pB. insightful...impenitent
+ {% Q" D  u2 EC persuasive...exultant
D thwarted...discomfited
  U' T0 I9 N$ F  gE successful...satisfied
5 h3 c6 z' a# c. ]5 a6 c
答案是D，但是我不理解什么叫“尽管FBI的计划受阻，他依然对上级的批评感到挫败”，好像没有让步或者转折的关系...
9 M! ]2 W% G( G. s% ]  n
  ?) V9 k0 J/ D9 O2 p+ _) x6 ~不太明白，希望能指教一下，谢谢啦～～

MarcUID: 2269564

这个。。排除法吧

markfu1022UID: 2306081

我自己选A的...“尽管FBI计划受阻，他依然对批判感到很开心”...感觉比正确答案稍微通顺点，虽然也不是很有逻辑...
) C# X, a7 l1 t( ^4 l
不解...