Answer:
The right option that could fill the blank is:
b. <em><u>Somos</u></em>.
- <em>Nosotros </em><em><u>somos</u></em><em> muy inteligentes.</em>
Explanation:
The translation of the sentence is:
- We <u>are</u> very smart.
The difference between <em>"ser"</em> and <em>"estar"</em> are below:
- <em>Ser:</em> This verb is used to reference qualities of a noun, such as a name, personality, physical and mental qualities.
- <em>Estar:</em> Usually this verb is used to identify the place in which a noun is located or its mood at that time.
How<u> in the sentence is mentioned the word </u><u><em>"inteligentes"</em></u><u> or </u><u><em>"smart"</em></u><u> in English, and that is a mental quality</u>, the verb that must be used is <em>"ser," </em>whose conjugation in Present Tense for the personal pronoun <em>"nosotros"</em> is <u><em>"somos."</em></u>