The historical skill of corroboration involves

The answer on apex is B: making sure a conclusion is acurate by checking several sources

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.

is this question from a book? ?