Final answer:
The maximum number of dogs that can be walked in a given day under the specified conditions is 20 dogs (option D).
Step-by-step explanation:
To determine the maximum number of dogs that can be walked, we need to consider the factors involved. Assuming each dog requires a fixed amount of time for a walk, the total time available in a day becomes crucial. Let's denote the time available as
, and the time required per dog walk as
The maximum number of dogs (N) can be calculated using the formula N =

Without specific values for
and
, we can still compare the given options. Since we're looking for the maximum number of dogs, we should choose the option with the highest numerical value. In this case, option D) 20 dogs represents the highest number, indicating that it allows for the most dogs to be walked within the specified conditions.
In summary, the final answer is D) 20 dogs, as it offers the maximum capacity for dog walking based on the available time and time per dog walk.