问题如下：
The default risk exposure that non-clearing members face comes from:
选项：
A.Clearing members only.
B.Other non-clearing members only.
C.Both clearing and other non-clearing members.
D.There is no default risk exposure among non-clearing members.
解释：
C is correct.
考点：risks faced by CCPs
解析： Non-clearing members的违约风险来源于与clearing members以及其它non-clearing members之间的交易。
解惑：清算所向会员结算，会员向非会员结算，所以非会员的违约风险是会员。
