In "The Star and the Lily," how does the young warrior's first dream propel the action of the plot?

a. It causes the Indians to send a number of warriors to go investigate the strange phenomenon

b. It motivates the star to experiment with several possible living spaces.

c. It convinced the Indians not to fear the bright star as a bad omen, but to welcome it.

d. It leads the star to hover with expanded wings over the homes of the village.