Truthful along side with making any actual since
The answer to your question would be C
On February the 15th, in 1898, The battleship Maine was sunk by the Spanish crown, in Havana Harbor. This was the reason why the United States declared war on Spain in May of the same year.
When the war ended, in December of 1898, Spain had lost all its control over the territories of Puerto Rico, Cuba, The Philippines Islands, and Guam, with some smaller islands as well.
The War ended with the ratification of the Treaty of Paris, that was signed on December 10th, 1898.
I'm not going to do this for you because it is a research project, but I can give you countries that are at war or war has ended.
Egypt
Libya
Afghanistan
Pakistan
France
Turkey
Russia
Ukraine
Syria
Iran
Iraq
Saudi Arabia
Israel
Brazil
Colombia
Mexico
(these are only the major wars currently going on, there are a total of 67 countries currently at war in the world)
The US is the only one who has "officially" ended the war with Iraq although there is still military involvment currently in the country.
Answer:
I will try, which grade are u in and what subject do you want help with?