问题如下：
A target zone regime has a fixed parity with fixed horizontal intervention bands that are somewhat wider than bands in simple fixed parity regime. Which of the following descriptions is most accurate?
选项：
A. We adjust target zone periodically to manage inflation expectations.
B. A target zone provides the monetary authority smaller scope for discretionary policy.
C. A target zone provides the monetary authority with great scope for discretionary policy.
解释：
C is correct.
Target zone will vary in order to manage inflation expectations. The wider bands, the greater scope for discretionary 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选项正确而B选项不正确。
target zone 的区间范围通常在2%，所以不需要周期性的调节。A选项不正确。
才2%的区间内，可以算great吗？
