Part or all of the following sentence is underlined; beneath the sentence are five ways of phrasing the underlined material. Select the option that produces the best sentence. If you think the original phrasing produces a better sentence than any of the alternatives, select choice A.  
One time a candidate for the Democratic nomination for United States president in 1972, Shirley Chisholm won 152 delegates before withdrawing from the race.
  One time
  She was
  Being
  To be
  As