Read the following context and choose the best option to answer the question.
Context: Yami made Yugi promise that he would at least not cry in front of Yami when if he left . They each knew that these two actions would make it impossible for Yami to leave and their hearts were already breaking enough . Yami tried to make Yugi promise that if he ever found someone that made him happy again , then Yugi was to take that chance and move on with his life while always keeping a special place in his heart for his pharaoh . He tried to make Yugi agree to this , but Yugi just told him profusely that nothing like that would ever happen .
Question: Why were the two so sad ?
Options: 
A. None of the above choices .
B. No one could leave .
C. Yugi had to leave .
D. Yugi could not leave .


C