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A
Yes, it's the main component
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B
No, the AFQT consists of Arithmetic Reasoning, Word Knowledge, Paragraph Comprehension, and Math Knowledge only; Assembling Objects is used in line scores for specific military jobs but does NOT affect enlistment eligibility
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C
Only sometimes
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D
It depends on the branch of service
Why this is the answer
AFQT (Armed Forces Qualification Test) composition: just four subtests of the ASVAB matter for AFQT: (1) ARITHMETIC REASONING (AR) — word problems involving math; (2) WORD KNOWLEDGE (WK) — vocabulary; (3) PARAGRAPH COMPREHENSION (PC) — reading comprehension; (4) MATHEMATICS KNOWLEDGE (MK) — high school math. AFQT is reported as a PERCENTILE — your score is compared to a reference population. Categories: I (93-99), II (65-92), IIIA (50-64), IIIB (31-49), IVA (21-30), IVB (16-20), IVC (10-15), V (0-9). Minimum AFQT for enlistment varies by branch and category: Army typically requires 31+, Navy 35+, Marines 32+, Air Force 36-65+ (depending on bonuses), Coast Guard 40+; in stricter recruiting periods, higher minimums apply. ALL OTHER ASVAB subtests (General Science, Electronics Information, Auto Information, Shop Information, Mechanical Comprehension, Assembling Objects) — these are LINE SCORES used to QUALIFY for SPECIFIC MOS (Army), AFSC (Air Force), Ratings (Navy), or MOS (Marines). Some examples: ARMY line scores like ST (Skilled Technical) = WK + PC + MK + GS; MM (Mechanical Maintenance) = AS + AR + MK + EI; OF (Operators and Food) = VE (verbal expression — WK+PC) + AR + AS + MC. ASSEMBLING OBJECTS is included in some Army line scores: GT (General Technical) uses VE+AR (so not AO); CL (Clerical) doesn't use AO; specific technical jobs may use AO. Air Force: AO is used in the Mechanical AFSC qualification; Navy/Marines/Coast Guard similar variation. WHAT THIS MEANS FOR TEST TAKERS: (1) If your goal is just to ENLIST: focus on the 4 AFQT subtests (AR, WK, PC, MK) since they determine eligibility; AO doesn't matter for enlistment qualification itself; (2) If your goal is a SPECIFIC JOB requiring spatial reasoning: AO matters; do your best on it; (3) Even if AO doesn't directly affect your line scores for your target job, doing well shows comprehensive ability; (4) If running out of time on ASVAB, prioritize the AFQT subtests over AO if you have to choose.
Source: ASVAB AO, AFQT and Line Scores