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
Option B: The block already contains multiple intersection regions, so tiling it would over-multiply the pattern.
Option C: Same issue as B — the block contains compound shapes that would create a denser, different pattern when repeated.

Remember for exam
For block-printing questions, mentally tile the block in rows/columns (with possible offsets or rotations) and check if the result matches the given pattern.

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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?