Choose the underlined part among A, B, C or D that needs correcting

An (A)  university is an institution of higher(B)  education and research, which (C)grants academic degrees;  including (D).Bachelor's degrees, Master's degrees and doctorates in a variety of subjects

A. on / of              

B. in / for              

C. with / at           

D. for / at

A. are reported to be                                  

B. are reported to have been

C. are reporting to have been                     

D. are reporting to be

A. of                     

B. in                     

C. for                             

D. with

A. took / were                                             

B. were taking / is

C. had taken / would have been                  

D. had taken / would be

A. of                     

B. on                    

C. for                             

D. in

A. should be done / being exploited            

B. we should do / exploiting

C. should do I be exploited                        

D. should have done / exploited