Correct. The answer is a. While Leonardo made sure to let the duke know that he could be of use in a wide variety of ways, he focused on the skill he believed the duke would value most.

Incorrect. The answer is a. While Leonardo made sure to let the duke know that he could be of use in a wide variety of ways, he focused on the skill he believed the duke would value most.

Correct. The answer is d. Leonardo's description of the doctor's role in curing illness highlights the importance of maintaining "a balance and harmony of elements," a central doctrine of classical medicine.

Incorrect. The answer is d. Leonardo's description of the doctor's role in curing illness highlights the importance of maintaining "a balance and harmony of elements," a central doctrine of classical medicine.

Correct. The answer is b. In the letter to the duke of Milan, Leonardo listed a series of inventions he could build for the duke. In contrast, the letter to the Works Department of the Cathedral of Milan emphasized Leonardo's familiarity with humanist ideas.

Incorrect. The answer is b. In the letter to the duke of Milan, Leonardo listed a series of inventions he could build for the duke. In contrast, the letter to the Works Department of the Cathedral of Milan emphasized Leonardo's familiarity with humanist ideas.

Correct. The answer is a. The poem finishes by claiming that the duke of Milan will protect Leonardo from the wrath of a jealous goddess because "men and gods alike fear to injure" the duke.

Incorrect. The answer is a. The poem finishes by claiming that the duke of Milan will protect Leonardo from the wrath of a jealous goddess because "men and gods alike fear to injure" the duke.