有效组合满足（）。

A.在各种风险条件下，提供最大的预期收益率；在各种预期收益率的水平条件下，提供最小的风险

B.在各种风险条件下，提供最大的预期收益率；在各种预期收益率的水平条件下，提供最大的风险

C.在各种风险条件下，提供最小的预期收益率；在各种预期收益率的水平条件下，提供最小的风险

D.在各种风险条件下，提供最小的预期收益率；在各种预期收益率的水平条件下，提供最大的风险

(100) whether to go with a shared or switched fast LAN technology once you start to max out your shared Ethernet of token-ring LAN is tough call. Users and analysts involved in (101) high-speed LANs have learned the benefits of each. However, there are trade-offs to each, and (102) which fast LAN technology to choose is critical for (103) network performance problems and (104) costly purchasing mistakes.

A．avoiding

B．clipping

C．choosing

D．deciding

E．dissolving

F．ensuring

G．evolving

H．implementing

I．Knowing

J．solving