Ab welchem Alter darf man in Hessen bei Kommunalwahlen wählen?

Why this is the correct answer

Hesse requires all voters to be at least 18 years old for local (Kommunal) elections. Some German states, including North Rhine-Westphalia and Brandenburg, have lowered their local voting age to 16, but Hesse has not followed suit. The minimum age of 18 applies to municipal elections in Hesse.