The legal considerations that have forced some universities to revise their affirmative action admissions programs are similar to the revisions that certain large businesses have recently made to their affirmative action hiring practices.

a
b. the affirmative action hiring practices that certain large business recently have revised
c.those that have recently forced certain large businesses to revise their affirmative action hiring practices.
d.those recent revisions that have been made by certain large businesses to their affirmative action hiring practices
e. what certain large businesses have done to their affirmative action hiring practices in th recent past.