Why was Portugal eager to invest in expeditions to Africa? A.
to venture beyond Africa and find a trade route to Asia
C.
to establish ports along African coasts and spread Christianity
D.
to sustain their plantations through slave trade with Africa

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`stare decisis is a legal doctrine that obligates courts to follow historical cases when making a ruling on a similar current or future case. stare decisis ensures that cases with identical facts be approached in the same way, unless overruled by the same court or a higher court such as the us supreme court. simply put, it binds courts to follow legal precedents set by previous decisions.

stare decisis is a latin term meaning "to stand by that which is decided".