题目：
选择题
Which of the following is WRONG about the comparison between the early version and the current version of Ethernet? __________
- A. The destination and source addresses have been overleapt in the current Ethernet versions.
- B. The original address fields in the experimental Ethernet have been changed in the current versions.
- C. The running speed of the current Ethernet is 100 times and beyond as fast as that of the early versions.
- D. A switched full duplex system can offer higher performance than the CSMA/CD scheme used by the early Ethernet.
答案：
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