Read the paragraph from the section "Committing Poems To Memory":

In ancient times, meter was used to fix words in communal memory. Verse that follows a consistent rhythmic pattern is easier to remember. Thus, it was possible for the first singers of epic tales to recite long, complex verses to their
audiences by heart

The author uses the phrase "communal memory" to mean what?

Knowledge that is claimed by a community

Poetry that was frequently recited in a public place

Knowledge that is shared by a group and passed on

Poetry that follows a formal pattern and is easily remembered