A, C, and D all have something being done to the nouns; in A, the girls <em>were chosen</em>, in C, the students <em>were given </em>something, and in D, the children <em>were treated. </em>B is the only one having a noun doing something actively.
To my mind, the correct answer is (A). According to this passage, the reader has only access to Nicki´s feelings and emotions. It is not stated the men´s motivation for chasing Nicki.
