<h2>Right answer:</h2><h3>b. marcar una casilla</h3>
If you're using an e-mail on a browser, you might be signed in automatically if your browser saved your username or password. You can do this on your browser. Regarding the sentence <em>marcar una casilla </em>the word marcar is an infinitive verb, the most basic form of verbs in Spanish. Finally:
<em>Cuando abres tu correo-e, puedes </em><em>marcar una casilla</em><em> para que la computadora recuerde tu contraseña.</em>
