Which of the Below Statements Is FALSE

Which of the below statements is FALSE?

A) All central markets have incentives to impose order consolidation rules on its members.
B) In addition to ECNs, other alternative trading systems (ATS) were developed as alternatives to exchanges.
C) Broadly, there are two types of ATS: (1) crossing networks, which have functioned since the 1980s; and (2) dark pools, which are much more recent.
D) Crossing networks are electronic venues that display quotes but anonymously match large orders.