Locate the infinitive. since it is used as a noun, determine its noun use.
he likes to be chief.
infinitive:
noun use:

he likes to be chief.

infinitive:   to be

use:   direct object

the anwser is went creeping down the river again, across the wide lonely marshes to the sea.

i longed to go with them out into the world to seek my fortune in foreign lands—africa, india, china and peru!

and, dreaming of the lands i had never seen, i'd sit on there, watching till they were out of sight.

b would have to be the answer