There are six noted types of twelve-step meetings. in meetings, one recovering person speaks to the group about his/her addiction and recovery story.

There are six noted types of twelve-step meetings. In "speaker" meetings, one recovering person speaks to the group about his/her addiction and recovery story.
In situations where the open or closed meetings are the mainly utilized, group conscience has assigned the gathering as a speaker meeting. Normally speakers are exchanged between gatherings. These speakers share their "experience, quality and expectation" in relating their landing in a calm life and their pledge to looking after restraint.

It’s either d or b ! but it might be b