(A) Germany invaded Poland.
(B) Germany sent Mexico a secret telegram.
(C) ** Japan bombed Pearl Harbor.
(D) Germany bombed Pearl Harbor.
EXPLANATIONS BELOW
Concept note-1: -On December 7, 1941, following the Japanese bombing of Pearl Harbor, the United States declared war on Japan. Three days later, after Germany and Italy declared war on it, the United States became fully engaged in the Second World War.
Concept note-2: -On December 7, 1941, a date that President Franklin D. Roosevelt claimed would “live in infamy, ” the Imperial Japanese Navy conducted a surprise aerial assault on Pearl Harbor. This unprovoked attack brought the United States into World War II, as it immediately declared war on Japan.
Concept note-3: -President Roosevelt moved the US Pacific Fleet from California to Pearl Harbor in 1939. This move was a threat to Japan, who wanted to expand in the Pacific. Military leaders and politicians saw a war between the U.S. and Japan as inevitable, with the solution being to attack first. Japan did just that.