Answer:
The answer is: Indirect object pronoun.
Step-by-step explanation:
Let's discard the other options first; reflexive pronouns are: Myself, himself, yourself, etc... which is the equivalent in Spanish of: A mí mismo, a sí mismo, a ti mismo, etc... A direct object pronoun is the object that the action is happening, for instance in the following sentece: My mom ate a donut; donut here is the direct object. And well, Indirect object pronouns are: me, him, her, them, us, you... which is basically what "díganmelos" is --in English, tell me--.