The EPRs being built in France and Finland were designed by Areva (Paris: FR0011027143 - news ) , another state-owned French firm, but EDF has now taken over Areva's reactor arm and is working on an upgraded EPR it hopes will be easier and cheaper to build.
Take context from the input text and decide on the accurate relationship between 'Areva' and 'France' from the options provided.
Options: parent organization, operator, owner of, stock exchange