The single country with the world's largest GDP is
The member countries of the European Union have
about the same GDP as
Together, these four countries and the European Union
have
half of the world's total GDP.

The single country with the world's largest GDP is  ✔ the US .

The member countries of the European Union have about the same GDP as ✔ the US .

Together, these four countries and the European Union have  ✔ more than  half of the world's total GDP.

what are the choices? the multiple choices?

i will answer in the comments after the choices have been said.

i feel as if they would both catch on before to long because they would see them to frequent