题目内容：
What does the author imply by "Until now such bonds have largely been the preserve of rich-country is-suers" ( Line 3-4, Para.2) ?（ ）
A． The catastrophe bonds are mainly reserved by rich countrie B． Only rich countries have the ability to issue the catastrophe bond
C． Rich countries seldom issue the catastrophe bond
D． Most of the catastrophe bonds are raised in rich countrie
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答案解析：