<u>Answer:</u>
The <u>Direct Object,</u> is the part of the sentence that receives the action of the verb. It is<u> used to replace a person, animal or thing</u> in the conversation or in the writing in order <u>to avoid repetition</u>; when they have already been seen in a sentence or external context where the statement occurs.
According to the Subject Pronouns the Direct Objects are:
1st person singular Yo: <u>me</u>
2nd person singular (informal) Tú: <u> te </u>
2nd person singular (formal) Usted: <u>lo/la
</u>
3rd person singular El/eso/Ella/esa: <u>lo/la
</u>
1st person plural Nosotros: <u>nos </u>
2nd person plural Ustedes (In latinAmerica): <u>los/las</u><u> </u>
2nd person plural Vosotros (In Spain): <u>os</u>
3rd person plural Ellos/Ellas: <u>los/las</u>
In the sentence Ayer compré el jabon (yesterday I bought the soap), <em>el jabon</em> (it) receives the action of the verb <em>compré</em> (bought).
Then, according to the list above, the Direct object that fulfils <em>el jabón</em> (third person singular masculine<em> eso</em>) is <u>lo</u>.
Therefore, the correct answer is C:
<h2>Ayer <u>lo compré
</u></h2>