Since my opponent has taken the center position (1,1), I'll take the top-left corner (0,0). This is a strong strategic response to a center opening. By occupying a corner, I create multiple potential winning paths - along the top row, the left column, and the main diagonal. This forces my opponent to play defensively on their next move. If they don't respond optimally, I may be able to create a fork situation (where I have two simultaneous threats) on my next turn, giving me a strong advantage. In Tic-Tac-Toe, corners are generally the best response when the opponent starts in the center.