The Norwegian government started legal action recently

The Norwegian government started legal action recently to try and block the so-called Robin Hood tax because it could ensnare countries outside the Eurozone that do not adopt the law.

A) to try and block the so-called Robin Hood tax because it could ensnare countries outside the Euro Zone that do not adopt the law

B) to try and block the so-called Robin Hood tax; the tax could ensnare countries outside the Euro Zone that do not adopt the law

C) to try to block the so-called Robin Hood tax because it will ensnare countries outside the Euro Zone, which do not adopt the law

D) to try to block the so-called Robin Hood tax on the grounds that it could ensnare countries outside the Euro Zone that do not adopt the law

E) to try to block the so-called Robin Hood tax due to the fact that it will ensnare countries outside the Euro Zone that do not adopt the law

->"to try to block" is the correct idiom, A & B are out
-> Which in option C refers to the Euro zone, hence wrong, C out
-> "on the grounds that it COULD" is preferred to "due to the fact that it WILL"

OA is D