I would say the them that is apparent in these lines is C.) mortality because he talks about corruption and Caesar being "dead turned to clay". this can be interpreted as a way of saying that death is inevitable.
The theme of the play is C. mortality In literature, Mortality theme always to tried to find out the deeper meaning behind death. From the lines above, we can see that Shakespeare somehow indicated that even the living world is made from death and decay that nobody, even the mightiest able to escape from.
