Los niños le ruegan a la enfermera que les una curita. a. da b. dé c. den

The right option that fills the blank is:

b. Dé.

- Los niños le ruegan a la enfermera que les dé una curita.

Explanation:

The verb "dar" conjugated in its subjunctive form, in the case of the sentence should be focused on the noun "la enfermera" who is the person who performs the second action mentioned within the sentence, not "niños" or children, taking this into account you can review the possible conjugation of the verb give in subjunctive form:

1. Yo dé.

2. Tú des.

3. Él dé.

4. Ella dé.

5. Ello dé.

6. Nosotros demos.

7. Ellos den.

Then, the correct conjugation taking into account the personal pronoun "ella", which replaces the noun "la enfermera", is "dé".