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A
It is on all versions of the ASVAB
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B
AO appears on the paper-and-pencil ASVAB given in high schools and Armed Forces Recruiting offices (Student ASVAB); it does NOT contribute to the AFQT score used for enlistment eligibility, but it IS used by some branches for specific job qualification line scores
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C
AO is only on the Navy's version of the ASVAB
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D
AO was removed from the ASVAB entirely in 2020
Why this is the answer
ASSEMBLING OBJECTS SUBTEST AVAILABILITY: AO is included on the PAPER ASVAB (Form versions) used in high schools and Armed Forces Career Centers, but it is NOT part of the COMPUTER-ADAPTIVE TEST (CAT-ASVAB) administered at MEPS for final enlistment processing. AFQT SCORE: The Armed Forces Qualifying Test score (which determines enlistment eligibility) is derived from four subtests: Arithmetic Reasoning (AR), Mathematics Knowledge (MK), Word Knowledge (WK), and Paragraph Comprehension (PC) — AO is NOT one of them; JOB QUALIFICATION USE: Some military branches use AO in their line score calculations for specific job qualifications, particularly technical roles requiring strong spatial ability; these line scores are calculated from the paper ASVAB; STUDENT ASVAB: Given to high school students to help explore career options; scores are used by branches for initial interest screening but the formal enlistment ASVAB is re-taken at MEPS; PRACTICAL IMPLICATION: If you take the high-school ASVAB and receive a low AO score, it is worth improving through practice before any formal MEPS processing; if AO contributes to a line score for your desired specialty, improving that score matters for your specific job options even though it does not affect overall eligibility.
Source: ASVAB Assembling Objects, Test Version and Scoring