which option shows an example of organization by cause and effect?

a because the city had to reschedule the parade, the famous director was no longer available to be grand Marshal
b the local author is available on the parade date, but hates crowds. on the other hand, the movie star loves crowds, but may not be available on the parade date
c the parade needs a grand marshal, and the council could choose a local celebrity, someone nationally known, or perhaps a political figure
d on July 5, the famous director canceled his appearance. By July 7, the council was exploring new options

a because the city had to reschedule the parade, the famous director was no longer available to be grand Marshal