Answer:
A. The Spartans were willing to fight bravely even if they could not win.
Step-by-step explanation:
The Battle of Thermopylae was fought between an alliance of Greek city-states and the Persians. The Spartans were defending Thermopylae, with just 300 Spartans standing guard on a narrow pass.
As seen in the given excerpt, the Greek's comment that the arrows of the Persians would darken the sun with their multitude doesn't seem to scare the Spartans. Instead, Dieneces replied that "If the Persians darken the sun, we shall have our fight in the shade." This indicates that the Spartans were willing to fight courageously even though they know their enemies have a larger army and they would not probably win.
Thus, the correct answer is option A.