How is the underlined pronoun in the sentence used?

There were 15 people among us who knew CPR.

A.
possessive

B.
subject

C.
direct object

D.
object of a preposition

@sarah786 @bookworm00981 @esshotwired

Question

How is the underlined pronoun in the sentence used? 


There were 15 people among us who knew CPR.
 
 A.
possessive
 
 B.
subject
 
 C.
direct object
 
 D.
object of a preposition

@sarah786 @bookworm00981 @esshotwired

anonymous · Answer

underline ???

anonymous · Answer

@sarah786 I'm horrible at this xD Sorry! 
The underlined word is us.

anonymous · Answer

among us is prepositional Phrase so what would be 'us' ???

anonymous · Answer

It tells me that 'us' is the underlined pronoun.

anonymous · Answer

'us' is object of preposition .

anonymous · Answer

( ͡° ͜ʖ ͡°)