What does one pay automatically in Germany when permanently employed?

EDITORIAL LEARNING AID

Why is this answer correct?

In permanent employment, social insurance contributions are deducted directly from wages and paid to the funds by the employer. Social assistance (b) and housing benefit (d) are state benefits for people in need, and child benefit (c) is paid by the state to parents.

Permanently employed: social insurance is deducted directly from wages.

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