Please select the most appropriate option out of the five options given for each of the folllowing sentences, which, in your view, should be grammatically and stucturally correct. Please not that the meaning & context of the sentence must not change. (a) Although I already knew the answer and he invited me to visit him often, since I just have seen her in the square, I was never determined to yield this point. (b) Although I have already known the answer and the invited me to visit him often but since I just have seen her in the square, I was not determined to yield this point. (c) Although I knew the answer already, and he has oftern invited me to visit him, since I just hae seen her in the square, I am never determined to yield this point. (d) Although I already know the answer and he often invited me to visit him, since I have just seen her in the square, I am determined never to yield this point. (e) None is true.