【正确答案】 A

【答案解析】信息明示题。由AT＆T plans to spend 18 billion dollars in 2019 upgrading its wireless networks to handle the increasing amount of new traffic．可知，180亿美元是用于更新网络，解决网络容量小的问题的。故选A。

【正确答案】 C

【答案解析】细节推断题。由particularly in big city have complained about dropped calls，slow Internet access and poor service．可知．在大城市面临的抱怨会更多。故选C。