问题如下图：
选项：
A. 
B. 
C. 
解释：
老师能解释下这道题c选项为什么对吗？为什么b不对
NO.PZ2018062003000215 问题如下 A target zone regime ha fixeparity with fixehorizontintervention ban thare somewhwir thban in simple fixeparity regime. Whiof the following scriptions is most accurate? A.We aust target zone periocally to manage inflation expectations. B.A target zone provis the monetary authority smaller scope for scretionary policy. C.A target zone provis the monetary authority with grescope for scretionary policy. C is correct.Target zone will vary in orr to manage inflation expectations. The wir ban, the greater scope for scretionary policy.考点Exchange Rate Regimes解析为了管理通胀预期，目标区间将有所不同。波段越宽，自由裁量政策的空间就越大。所以C正确而B不正确。target zone 的区间范围通常在2%，所以不需要周期性的调节。A不正确。 既然C都对了，那A错哪里了呢？
NO.PZ2018062003000215 问题如下 A target zone regime ha fixeparity with fixehorizontintervention ban thare somewhwir thban in simple fixeparity regime. Whiof the following scriptions is most accurate? A.We aust target zone periocally to manage inflation expectations. B.A target zone provis the monetary authority smaller scope for scretionary policy. C.A target zone provis the monetary authority with grescope for scretionary policy. C is correct.Target zone will vary in orr to manage inflation expectations. The wir ban, the greater scope for scretionary policy.考点Exchange Rate Regimes解析为了管理通胀预期，目标区间将有所不同。波段越宽，自由裁量政策的空间就越大。所以C正确而B不正确。target zone 的区间范围通常在2%，所以不需要周期性的调节。A不正确。 题目基本全部不会做，如果重要的话是不是考虑重新录一节
NO.PZ2018062003000215 问题如下 A target zone regime ha fixeparity with fixehorizontintervention ban thare somewhwir thban in simple fixeparity regime. Whiof the following scriptions is most accurate? A.We aust target zone periocally to manage inflation expectations. B.A target zone provis the monetary authority smaller scope for scretionary policy. C.A target zone provis the monetary authority with grescope for scretionary policy. C is correct.Target zone will vary in orr to manage inflation expectations. The wir ban, the greater scope for scretionary policy.考点Exchange Rate Regimes解析为了管理通胀预期，目标区间将有所不同。波段越宽，自由裁量政策的空间就越大。所以C正确而B不正确。target zone 的区间范围通常在2%，所以不需要周期性的调节。A不正确。 视频里老师几句话带过了。。助教老师能详细讲解不
A target zone provis the monetary authority smaller scope for scretionary policy. A target zone provis the monetary authority with grescope for scretionary policy. C is correct. Target zone will vary in orr to manage inflation expectations. The wir ban, the greater scope for scretionary policy. 考点Exchange Rate Regimes 解析为了管理通胀预期，目标区间将有所不同。波段越宽，自由裁量政策的空间就越大。所以C正确而B不正确。 target zone 的区间范围通常在2%，所以不需要周期性的调节。A不正确。 才2%的区间内，可以算great吗？
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