question: what is rare in geologic history?
choices.text: weathering thinning and weakening Stomata closing mosses, lichens, and hornworts water evaporating Mineral graphite mosses, liverworts, hornworts planet buried in snow and ice
choices.label: A B C D E F G H
formatted_question: what is rare in geologic history? (A) weathering (B) thinning and weakening (C) Stomata closing (D) mosses, lichens, and hornworts (E) water evaporating (F) Mineral graphite (G) mosses, liverworts, hornworts (H) planet buried in snow and ice