Answer:
The correct answer is option c) Es serio.
Explanation:
Sancho Panza is Don Quijote's squire, which accompanies him in the adventures of being a black knight in Spain.
Physically different from Don Quijote, who was tall and thin, Sancho Panza was short and a little bit fat. Therefore answer a) Es alto ("He's tall") and option b) Es flaco ("He's thin") are incorrect.
On the other hand, Sancho's personality was quite passive, and his humor was not funny, as option D) Es gracioso ("He is funny") mentions, so it is incorrect.
Moreover, Sancho was really serious about what he said. He actually is known as the character that really knew what he was saying but not really sure about he was doing. For this reason, the correct answer is option c) ES SERIO ("He's serious").
