Answer:
A. The dogs ate their food too quickly.
Step-by-step explanation:
The first sentence “the dogs ate their food too quickly” contains the possessive pronoun ‘their’. this is because "their" signifies that the food which the dogs were meant to eat. As soon as their food was given to them they ate it. ‘Their’ is a possessive pronoun here because it replaces the noun that could have been used. Here it is also determining the ownership of the dogs for their food. This also shows that it belongs to someone in particular.