It is (a). Iraq invaded Kuwait. The war was a conflict between Iraq and a force of nations.The lead up to the war began with the Iraqi invasion of Kuwait.
The Incas were highly advanced in terms of mathematics and
astronomy. Their unique architecture of
massive stonework is made possible by their great understanding of mathematics.
Inca structures where made of precisely hewn stones that fit together so
perfectly without use of mortar. They also understood astronomy and made very
accurate calendars.
There were three types of British colonies: royal, proprietary, and self-governing. Each type had its own characteristics.
My best guess at the correct answer is D. This is because studying and experience is always better than having nothing.