Answer:
The third option
Step-by-step explanation:
To know this in a better way, rather than just telling you the option, let me explain why is the correct option.
Let's discart all the options first.
Option A: the erlenmeyer flask is the only container that can hold a liquid.
This is not true, you can either use a beaker or a volumetric ball to hold a liquid, so this is the obvious reason to discart this option.
Option B: the erlenmeyer flask's narrow mouth makes it easier to pour the solution.
Actually if we want an easier way to pour a solution we can actually use a beaker that has a wider mouth to pour the solution, so this cannot be the reason to use an erlenmayer instead of another glassware.
Option D: the erlenmeyer flask is the only glassware that will accommodate a filter funnel
As it was stated in the reasons for option A, you can use another glassware such a volumetric ball or beaker to accommodate in the filter funnel, even with a wider mouth. the erlenmayer fits better that's true but it's not the best and accurate reason for choosing this, instead of another glassware.
Option C: the erlenmeyer flask's narrow mouth can support the funnel and prevent breakage.
Now, this is the actual correct answer basically because the narrow mouth of the flask, prevent any king of breakage and losing solution of this way, and fits really well in the funnel. Therefore this is the best and accurate reason.