Siempre digo la verdad a mi madre.

Restate the sentences, replacing the underlined words with the correct direct or indirect object pronoun.

No words underlined.

if something was underlined it would be:

Siempre le digo la verdad.

juan carlos puede traer los refrescos a la fiesta

Siempre le digo la verdad a mi madre.

Explanation:
To restate the sentence, we need to replace the indirect object "a mi madre" with the indirect object pronoun "le". The correct sentence would be "Siempre le digo la verdad".