Context: Bumblebee served under him . Bulkhead was in charge of all of Cybertron 's space bridges . And Ratchet was retired on some quiet planet with a pink and white femme that he 'd known from before . They were all gone .
Question: What may have been true of them in the past ?
Option 0: They had served on a quiet planet .
Option 1: None of the above choices .
Option 2: They had met once on a bridge .
Option 3: They were closely connected with one another .
Answer: 3