____your son is well again,you have nothing to worry aboutA because B in order that C since D so that

问题描述:

____your son is well again,you have nothing to worry about
A because B in order that C since D so that

选C
解析:翻译“既然你儿子(身体)已经好了,(那么)你就没什么好担心的了”
A “因为”
B“为了”
C“既然”
D“”以便,所以