为什么答案B，in brokered market，不对呢？
Seconry market bontransactions most likely take plaon organizeexchanges. Seconry market bontransactions most likely take plain brokeremarkets. A is correct. In seconry market, alers post bianask prices anearn a sprebetween them. Seconry market bontransactions most likely take plain aler markets.老师 aler market 和 brokeremarket 区别有哪些？
老师，这道题的大概翻译是什么呢？B为什么不对，另外为什么对
