If you want to use a Boolean term that will return results with either of the items in you search, you would use. please help A. not
B. or
C. And

Explanation:

or, is the correct answer for this question in this case simple and short

on the morning of  july 21,  1861, general mcdowell ordered the  unionarmy to attack. it was on this hill that  confederate  colonel thomas jackson and his forces held back theunion  troops.