2.Each country has her national flag, and usually there is a story behind each national flag. The national flag of theUnited Kingdom tells an interesting story, too. 

    The UK has four parts. They are England, Wales, Scotland, and Northern Ireland. They all have their own flags.When Wales became part of England in 1542, the flag of England was the one used — nothing was changed. However,in 1603, when Scotland joined England to become a new country, the two national flags were put together to have a newflag. The last member, Ireland, joined the kingdom in 1801, and it was in that year that the modern flag we see todayappeared. In 1992, however, parts of Ireland left the kingdom to become a new country. It also started to use its own flag.

43. Which is true about how the UK got its national flag?
(A)