A sentence uses the word 'citizens.' Which spelling is correct?

CITIZENS is on the USCIS WRITING VOCABULARY list under CIVICS. Correct spelling: C-I-T-I-Z-E-N-S. Singular: citizen (C-I-T-I-Z-E-N). Plural: citizens (add S). Common dictation sentences: 'Citizens have the right to vote.' 'Citizens can vote.' 'There are many citizens in America.' Spelling tip: the root word is C-I-T-I-Z-E-N (7 letters before the S); the tricky part is the Z in the middle and E-N at the end (not E-N-T or I-N). A CITIZEN is a person who is legally a member of a country. In the United States, citizens are those: born in the US; born abroad to US citizen parents; who become naturalized (the process the applicant is in when taking this test). Citizens have rights not available to non-citizens (voting in federal elections, running for federal office, obtaining a US passport). Citizens also have responsibilities (serving on a jury, obeying the law, serving in the military if required).