[Incomplete question conditions] Official D · 6907.30.3000 · cubes per m² not stated

What you will learn

Disputed-question explanation: official result first, then historical evidence, limitations and uncertainty.

Exam cover date and series (exam PDF page 1); Exam cover instruction; Exam cover tariff reference; Question 32 stem as printed (exam PDF page 14, rendered and viewed); Question 32 choices as printed; Answer key row 32 (exam PDF page 36, rendered and viewed); USITC HTS archive listing: 2017 Basic Edition release link; Chapter 69 PDF download provenance; Chapter 69 Note 1 (page 69-1, rendered and viewed); Chapter 69 Additional U.S. Note 3 (page 69-1); Heading 6907 text; 6907.21 parent line excludes 6907.30 and 6907.40 (page 69-6, rendered and viewed); 6907.21 water absorption line; 6907.30 subheading text (pages 69-11/69-12); 6907.30 glazed, under-7-cm branch (page 69-12, rendered and viewed; same as conflict-batch21 2017Basic69-12.png); 6907.30.20 first line (page 69-12); 6907.30.30 line under Other (page 69-12); conflict-batch21 first-round review, 2018apr-q32 finding; conflict-batch21 first-round decision; remaining-independent-batch24 independent review, 2018apr-q32; batch25 independent source preread, 2018apr-q32 constraint · April 25, 2018 Customs Broker License Examination (Series 840), Category V – Classification; question 32 and all five choices on exam PDF page 14 (rendered locally to /tmp and viewed); answer key row 32 on PDF page 36 (rendered and viewed); exam reference: Harmonized Tariff Schedule of the United States (2017 Basic Edition, No Supplements) — Chapter 69 PDF from USITC archive release basicCorrections2, listed on the archive page as '2017 HTSA Basic Edition (February 9, 2017)'; pages 69-1, 69-6, 69-11 and 69-12 rendered and viewed.
Explained using the historical edition for this exam.