cann't identify the other recipients of text

Is there a way to identify the other recipients of texts sent to multiple recipients? When I hold my finger on the text, it doesn't show who else received it. And there seems to be no way to reply to all. Although the iPhone isn't for me, I do like the way that all the recipients are named in the texts. Suggestions?

Enable the show the delivery reports option.

After looking in the phone settings as well as the text settings, I couldn't find the delivery reports option. Where is it?