Exporting the results of the choice module gives the firstname, lastname, group and choice.

This is not sufficient to do something with the results in external systems. It's even not always enough to differentiate students with the same name.

It would be good to include at least the username and email address in the export. A time stamp could also be useful for other reasons

It would be good to think about all exports in Moodle and make them have the same basic columns on top of the module specific ones.