Both a and c are correct, however I think that A would be the most correct answer in this case.
The correct answer is D. Most European nations are part of the European Union.
Explanation:
The map shows the European nations and whether these belong or not to the European Union (economic and political alliance). In this map, the countries in blue are those that are already part of the union, the countries in red are candidates, and the countries in green do not belong to the union. In this context, most of the European countries are part of this union. Indeed, there are around 24 countries in blue (members of the union) and only around 9 countries in green (countries that are not part of the union). Besides this, member countries include nations such as France, Spain, Germany, Greece, and Italy; while non-members include Russia, Ukraine, and Belarus. According to this, one true statement about the map is statement D.
The statement is false, as the Battle of Gettysburg resulted in a defeat for the southern Army.
The Battle of Gettysburg was a battle of the Civil War, fought between July 1 and 3, 1863 around the town of Gettysburg, Pennsylvania, as part of the Gettysburg campaign. It was the battle with more casualties in the United States, and it is considered the turning point of the Civil War along with the siege of Vicksburg. It marked the beginning of the Union's offensive. It was a great victory for the Army of the Union and a disastrous event for the Confederation.
