The correct answer to fill in the blank in the sentence "La policía al ladrón" is:
B. persiguió
Here's the explanation:
1. In the sentence provided, the verb needed should be in the preterite tense to match the context of the action completed in the past.
2. The verb "perseguir" means "to chase" or "to pursue" in Spanish.
3. When conjugating "perseguir" in the preterite tense for the third person singular form (él/ella/usted), it becomes "persiguió."
4. Therefore, the sentence should read as "La policía persiguió al ladrón," which translates to "The police chased the thief."