The correct answer is: Le.
Let's first detect the indirect object in this sentence.
Julieta solicita los fondos para la caridad a la presidenta de la compañía.
(Julieta requests charity funds from the company president.)
In Spanish, the indirect object specifies the beneficiary or the recipient (addresse) of the action going on in a sentence. In this case:
the subject = <em>Julieta</em>
the action = <em>solicita</em>
the direct object = <em>los fondos para la caridad</em>
the indirect object = <em>a la presidenta de la compañía</em>
So, the company president is the recepient TO WHOM is addressed this action.
The pronoun that substitutes the indirect object in Spanish is:
LE for the singular indirect object
LES for the plural indirect object.
Therefore, in this particular example, we would change <em>la presidenta de la compañía</em> for <em>le.</em>
<em />
<u>Julieta LE solicita los fondos para la caridad.</u>
<u />
Or we can also repeat the whole indirect object:
Julieta le solicita los fondos para la caridad a la presidenta de la compañía.