After the severe riots, the police continued the curfew lest there was no recrudescence of disorder.

Answer: Option A

Recurrence : the fact of occurring again.
Spread : open out (something) so as to extend its surface area, width, or length.
Exaggeration : a statement that represents something as better or worse than it really is.
Aggravation : the state of becoming worse or more serious; exacerbation.
Recrudescence : the recurrence of an undesirable condition.

Synonym of Recrudescence is Recurrence