单选题 5G stands for fifth generation, meaning the next step in the progression of technology to replace the current 4G system.4G was the replacement for 3G, which came a and so on.

Earlier "G" systems were designed to improve mobile communication operations.Each new technology brought major improvements in speed and greatly increased ne capacity.

The new 5G system promises more of the same.It is expected to permit more users to do more things -- at a faster rate.

Wireless industry groups say 5G will help fu "smart cities" by connecting sensor networks.

Such networks will be able to control vehicle traffic and quickly identify streetlight outages.

5G is also expected to conn driving cars and support new technologies involving virtual reality.

Higher 5G speeds could also permit doctors to commonly perform remote medical operations.

Fac and businesses could use 5G technology to increase automation and improve the collection of information.

According to the wireless industry groups, by connecting what? 5G will provide fuel for future "smart cities".________.
【正确答案】 B
【答案解析】