The primary doctrine of the Protestant Reformation was​

Explanation:

 The idea that the forgiveness of sins and eternal life are given unconditionally for Christ's sake and do not depend on the worthiness of the sinner.

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during the 20th century, the role of the vice president has evolved into more of an executive branch position. now, the vice president is usually seen as an integral part of a president's administration and presides over the senate only on ceremonial occasions or when a tie-breaking vote may be needed.