Are you asking for a true or false question or what?
The correct answer is D. it gave the French an excuse to seize even more of the Vietnamese land. Later on in the 20th century, Fance stuggled to control it's territories in Indochina. In the end, after the war in 1954. it complete lost it's territories and had to give up after the battle at Dien Bien Phu.
An organization that is made up of many parties or groups united in an alliance or league.
Using simple words, imperialism is a policy of certain country involving a will of extending its power by using any kind of pressure or force.
For example - In 1939 Nazi Germany together with Soviet Russia jointly invaded Poland, in the result, both countries extended its borders.