The correct answer to this open question is the following.
You forgot to include the painting and the options for this question. However, doing some research, we can say the following.
The most likely message this painting sends to French citizens is that "one must be prepared to sacrifice their own children to preserve France."
The painting describes the scene when Brutus, a Roman official, had to defend Rome against the rebels. Among those rebels were the Brutus's sons. So Brutus had to make a decision. To defend their own sons or fight to defend his own nation. Brutus chose the second one.
In the painting, we can see Brutus and family members mourning the death of the sons.
