Since my opponent has taken the center position (1,1), I'll place my O in the top-left corner (0,0). This is a strong strategic response when the opponent takes the center. By playing in a corner, I'm setting up potential diagonal and edge-based winning opportunities. This also forces my opponent to be more defensive and could allow me to create a fork (two potential winning lines) in future moves. Any corner would be equally strong at this point due to the board's symmetry, but I'm choosing the top-left to begin developing my position.