阅读理解：阅读下面的短文，根据文章内容从A、B、C三个选项中选出一个最佳选项。

London.s River Thames has twenty-seven bridges. But Tower Bridge, the first bridge over the Thames as you travel to London from the sea, is the most famous of them all. What makes TowerBridge so exciting Why do visitors come from all over the world to see it

The thing that is surprising about Tower Bridge is that it is open in the middle. It does this to let thebig ships through to the Pool of London. If you are lucky enough to see the bridge with its two opening arms high in the air, you will never forget it.

On its north side stands the Tower of London itself. Although they look the same age, the Tower isalmost a thousand years old, and Tower Bridge is only about one hundred, it was built in the 1890s.By1850, everyone agreed that a bridge across the Thames near the Tower was most necessary. Butthe designers argued about the new bridge for anotherthirtyyears. This took so long because they hadtwo big problems.
Which of the following is NOT true according to the passage
(analysis)
.You can see the bridge with its two opening arms high in the air at anytime.
.

By 1850 everybody thought it most necessary to have a bridge built across the Thames near

the Tower.
.It took the designers thirty years to argue about the bridge before it was built.