Which of the following literary elements can be found in most of arthur conan doyle's detective stories?
a. a villainous medical doctor
b. a setting that dramatically contrasts with london
c. a mysterious and suspenseful mood

this would be in the imperative mood. it is a category of verb forms that are used to express orders,instructions,commands or requests.

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.