Honestly I’d disagree. I was a bit confused at first but moment I realized I could resize the grid, the answer strikes me as obvious and clear. Yes, in some theoretic sense you can argue a 3 x 3 grid answer is fine, but shows this to 100 different humans and majority would agree that resizing the grid is the obvious and more natural solution.
This is IQ tests all over again. Actually testing how alike you think to the author of the test.