Who was was the portuguese ruler who encouraged ocean exploration

The collapse of the roman empire most likely to empower the catholic church because

What was the national government’s biggest concern if facing a war, under the articles of confederation? the national government had no national military. the country had grown too large to defend with a small army. the states would not back the federal government. there was no way the states would pay for fighting a war.

Who believed that the best economic system was on in which businesses compete to gain profit with minimal or no government control