From what age may a person vote in local elections in Saxony?

EDITORIAL LEARNING AID

Why is this answer correct?

In Saxony, people may vote in local elections from the age of 18; this is laid down in the Saxon Municipal Code. 14 is far too young, and 16 applies to local elections only in other federal states, for example in Saxony-Anhalt or Thuringia. 20 is not a voting age anywhere in Germany.

Saxony is the exception in the east: local elections only from 18.

This translation and explanation are editorial learning aids. The official German wording and answer key govern the examination.