choices.label: A B C D
choices.text: ignition:burning:extinguishing sowing:plowing:harvesting reform:experiment:innovate design:production:sales
explanation: to have "writing", there must be "conceptions", and then "publishing" is possible, but "publishing" is not necessary. "ignition" is not indispensable to realize "burning". spontaneous combustion is also one way of burning. the necessary condition for "burning" is not "ignition". "sowing" is not indispensable to realize "plowing". there is no need to have "reform" in order to have "experiments". to have "production", there must be "design", and then "sales" is possible, but "sale" is not an indispensable process.
relation: writing conception R5.4
relation: production design R5.4