问题如下：
Which of the following factors would best justify a decision to avoid investing in a country’s sovereign debt?
选项：
A.Freely floating currency
B.A population that is not growing
C.Suitable checks and balances in policymaking
解释：
B is correct.
Among the most important considerations in sovereign credit analysis is growth and age distribution of population. A relatively young and growing population contributes to growth in GDP and an expanding tax base and relies less on social services, pensions, and health care relative to an older population.
老师，为什么出入境不受限制的货币对于其主权债券是有利因素？
