The first. In German, many words that refer to a person (e.g. Fahrer/Fahrerin, male/female driver) have a plural which is identical to the male singular. For a while now, many writers have used a typographic style to make the plural gender-neutral by writing the male plural, an asterisk, and then the female plural suffix (e.g. Fahrer*innen).
https://en.wikipedia.org/wiki/Gender_star