The table is missing, however I found the value of the orbital period of Deimos on the web:
[tex]t=30.4 h[/tex]
So, 30.4 hours. With a simple proportion we can convert it in days:
[tex]1 d: 24 h=x:30.4 h[/tex]
from which we find
[tex]x= \frac{30.4}{24}=1.26 d [/tex]
So, 1.26 days, which corresponds to answer C).
