Great Britain formed when

A. the English took control of the American colonies.

B. Ireland and England united.

C. the English colonized India.

D. Scotland joined England.

When Scotland joined England would be the most likely answer since Wales, England, and Scotland are modern Great Britain.

Great Britain formed when Scotland joined England. The correct option in regards to the question given is option "D". In the year 1707, the treaty signed in the year 1706 got ratified and the parliament of the two countries merged to form Great Britain. The political map of Great Britain includes the England, scotland and Wales combined. It does not include the country of Northern Ireland. Great Britain has a maximum number of people from the Christian community. It is also considered as one of the powerhouse of the modern world because of its financial and military might.