(A) True
(B) ** False
EXPLANATIONS BELOW
Concept note-1: -The Romanian government signed a treaty with the Allies (France, Britain, Italy, and Russia) on 17 August 1916 that pledged to declare war on Austria-Hungary by 28 August. The Romanian ambassador in Vienna actually transmitted the declaration of war on 27 August.
Concept note-2: -The United States later declared war on German ally Austria-Hungary on December 7, 1917. Germany’s resumption of submarine attacks on passenger and merchant ships in 1917 became the primary motivation behind Wilson’s decision to lead the United States into World War I.
Concept note-3: -The Battle of the Somme is one of the most infamous battles of the First World War. The battle took place between 1 July and 18 November, 1916. After 18 months of deadlock in the trenches on the Western Front, the Allies wanted to achieve a decisive victory.