Why did Japan attack China in 1937, launching the Second Sino-Japanese War?

to spread communism to other parts of Asia
to secure natural resources for its growing economy and military
to secure a buffer area against a potential Soviet attack on Japan
to retaliate after China’s attack on Japanese port cities

it is  A.  to secure natural resources for its growing economy and military

i do not know if this question has options, but a main impact of the federal reserve act of 1913, which created the federal reserve bank, was the international use of the u.s. dollar, which soon became the world's leading currency - particularly during world war i, since many nations around the world asked the united states for money.

the supreme court can hear any case it wishes as long as four justices agree to hear it.

hope this , give me brainliest answer =j