How is the underlined pronoun used in the sentence?

The winners of that trade were definitely Paco and I.

A.
direct object

B.
predicate nominative

C.
object of a preposition

D.
subject

Underlined is I.

Question

How is the underlined pronoun used in the sentence? 

The winners of that trade were definitely Paco and I.
  
 
 

 
 

  

  A. 
  direct object   
   

 
 

  

  B. 
  predicate nominative   
   

 
 

  

  C. 
  object of a preposition   
   

 
 

  

  D. 
  subject  

Underlined is I.

anonymous · Answer

okay so i wish i could help u but i am taking the exact same test is urs called unit 9 lesson 9? for k12?