The sentence is in past tense. This is noted by the ending -ed in the word healed.
The correct answer is option A: He tells him the "giants" are windmills.
Cervantes wrote Don Quixote in two parts, published respectively in 1605 and 1615. Sancho and Don Quixote come across a field of windmills, which Don Quixote sees as a group of giants. Sancho tells him they are not giants but windmills. Don Quixote replied that Sancho is not experienced in these matters, and that is why he can not see that they are clearly giants. Then, Sancho tries to dissuade Quixote, but he attacks one of the windmills, damaging his spear and acquiring some injuries. Sancho tells Quixote that it was foolish to attack the windmills. Quixote tells him that the evil magician Freston changed the giants into windmills to deprive him of his victory.
1. saves the trees, as it doesn't waste paper
2. provides access to more information
3. is more interactive than offline education and helps control the classroom
