决策的优化是不断地从传统决策向现代化决策转变的过程，下列关于城市规划管理的决策优化不正确的是( )。

A．优化决策结构

B．规范决策实施内容

C．提高决策技术

D．决策的民主化、科学化与法制化

Most IP layer-based proxy mechanisms, such as network address translation (NAT), only support uni-directional proxy, from the internal network to external network (the Internet). The proxy establishes the communication channel by (86) IP addresses. The IP addresses must be (87) . These proxy mechanisms prevent applications that must establish return data channels from establishing their data channels, such as, multimedia applications. IP layer-based proxy mechanisms need additional software (88) for each application that uses (89) channels. SOCKS identifies communication targets through domain names, overcoming the restriction of using private IP addresses. SOCKS can use domain names to establish communication between separate LANs, with (90) IP addresses.

（88）是（）

A.groups

B.blocks

C.models

D.modules