2:I[5751,[],""] 4:I[8003,["138","static/chunks/138-338b445c4cbceabf.js","3","static/chunks/3-b4862a6e1de95ec0.js","628","static/chunks/app/papers/%5BpaperId%5D/%5Byear%5D/%5Bid%5D/page-257c971832fd49dc.js"],"default"] 6:I[9275,[],""] a:I[1343,[],""] b:I[101,["138","static/chunks/138-338b445c4cbceabf.js","987","static/chunks/app/papers/%5BpaperId%5D/%5Byear%5D/layout-3942c697a7972a68.js"],"default"] c:I[6324,["138","static/chunks/138-338b445c4cbceabf.js","987","static/chunks/app/papers/%5BpaperId%5D/%5Byear%5D/layout-3942c697a7972a68.js"],"default"] 12:I[4080,["185","static/chunks/app/layout-f07fbac6855a712f.js"],""] 13:I[231,["138","static/chunks/138-338b445c4cbceabf.js","986","static/chunks/986-a23d2b0476d0b49a.js","368","static/chunks/app/papers/%5BpaperId%5D/page-879e8aaf99bd7bd0.js"],""] 15:I[6130,[],""] 5:T68d,

Answer: ["A","D"]

Key insight
The printed pattern shows overlapping circles arranged in a grid; any single block that, when tiled with offsets, produces the same overlapping circular pattern is valid — both the circle outline and the lens/vesica shape can generate it.

Step by step
Step 1: Analyse the pattern — it is a grid of overlapping circles where each circle overlaps its four neighbours, creating a classic "flower of life" style repeating motif.
Step 2: Option A (circle outline): stamping this in a grid with half-diameter offsets produces the exact overlapping circle pattern. ✓
Step 3: Option B (X-shaped petals): this block already shows the intersection regions, not the full circles — tiling it does not recreate the pattern. ✗
Step 4: Option C (double-X petals): similar issue — too many petal lines in a single block. ✗
Step 5: Option D (single lens/diamond shape): this represents one overlap segment; tiling it in alternating orientations recreates the same overlapping circle grid. ✓
Therefore the answer is A and D.

Why wrong options are wrong

Shown on the left is a pattern printed by repeated use of a single printing block. Which of the printing blocks shown on the right can be used to print the pattern?