The unspoken question that creates suspense is "How did he kill the old man?" Option B is correct.
In order to create suspect in a story, there are certain steps to be followed:
The key step is to pose a good dramatic question in the minds of the readers and you have to make the reader care about the answer. To do so, it is fundamental to pose it in the righ time. Furthermore, another crucial resource to create suspense is to build tension with small losses and small wins. In other words, you shouldn´t answer the dramatic question right away is your purpose is to create suspense.
