I believe that it would be B (reloj) since it is talking about how there is a window, a door and then a clock in a classroom.
It is also giving you the masculine singular form indicating that it can only be reloj.
<span>mochila is feminine, thus, la for singular, las for plural so if it is a definite article, and una or unas if it is indefinite article.</span>
In English, the Indirect Object pronouns are Me, You, Him, Her, Us, and Them
<h3>Choose the best word to fill in the blank:</h3>
Vamos a<u> celebrar </u>mi cumpleaños.
- Traslation: <em>Let's celebrate my birthday.</em>
<em></em>
The birthday in a celebration, where a person is congratulated because one more year of life. Friends and relatives arrive at the party, which leaves the birthday boy a gift and congratulates him on his birthday.
The person's birthday is a time of joy, both for the birthday boy, that the whole family is together.
