I think they allow their children too much . . . . . . .

The correct answer is C. latitude.

Latitude is the freedom to act or think as one wants. It is often used in the context of parenting, as in “I think they allow their children too much latitude.” In this case, the speaker is suggesting that the parents are too lenient with their children and do not provide enough guidance or discipline.

The other options are incorrect because they do not have the same meaning as latitude.

• Levity is the quality of being light-hearted or frivolous.
• Lassitude is a feeling of weariness or lack of energy.
• Liberality is the quality of being generous or open-minded.