To solve this, we need to count the number of possible paths from City M to City O through City N or directly.

Here’s the breakdown:

1. Direct paths from City M to City O:

   • There are 5 direct paths from City M to City O.

2. Paths from City M to City O via City N:

   • First, there are 6 paths from City M to City N.
   • From City N, there is 1 path to City O.
   • Therefore, the number of ways to go from City M to City O via City N is: $6 \times 1 = 6 \text{ paths}$

Total number of paths:

• Direct paths from City M to City O = 5
• Paths via City N = 6

Thus, the total number of paths from City M to City O is: $5 + 6 = 11$

Extending the paths from City M to City P:

Now we need to add the possibilities from City O or City N to City P. However, since the problem only asks about the number of paths from City M to City O, the correct answer is:

$\boxed{11}$