From what age may one vote in municipal elections in Bavaria?

EDITORIAL LEARNING AID

Why is this answer correct?

In Bavaria the voting age for municipal elections is 18; unlike in some other states, there is no voting age of 16 there. At 14 you are too young, and 20 is not a voting age in Germany.

Bavaria sticks to 18, including in local elections.

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