One approach is to use the Double Matrix Method. This technique can be used for questions featuring a population in which each member has two characteristics associated with it (aka overlapping sets questions).
Here, we have a population of football players, and the two characteristics are:
- male or female
- left-footed or right-footed

So we can set up our matrix as follows:

Notice that I used 25+ to represent the fact that there are AT LEAST 25 left-footed female players.

First recognize that we have a total of 100 right-footed players (male and female)
In order to maximize the number of right-footed male players, we must minimize the number of right-footed female players.
Since 0 is the minimum possible number of right-footed female players, we can let 0 equal the number of right-footed female players, which means there are 90 left-footed female players:


When we complete the matrix, we get:

This means there can be a maximum of 100 right-footed male players

Answer: D

To learn more about the Double Matrix Method, watch this video: