Although the fact you asked about digivolving really only leaves two possible answers.
[She's seen Optimus' partner evolve, and Wheeljack's. It's safe to say that Arcee's can too, since the female Autobot has been here longer than Whirl. SO REALLY, Jetstream is just doing basic elimination here. She's either talking to Otto or Vanguard.]
no subject
Although the fact you asked about digivolving really only leaves two possible answers.
[She's seen Optimus' partner evolve, and Wheeljack's. It's safe to say that Arcee's can too, since the female Autobot has been here longer than Whirl. SO REALLY, Jetstream is just doing basic elimination here. She's either talking to Otto or Vanguard.]