For how many years is the state parliament in Rhineland-Palatinate elected?

EDITORIAL LEARNING AID

Why is this answer correct?

The state parliament of Rhineland-Palatinate is elected for five years; after that a new parliament is elected. The figures 3, 4 and 6 do not apply to Rhineland-Palatinate and are therefore wrong.

Rhineland-Palatinate: state parliament for five years.

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