HELP ME RIGHT NOW!!!! AND BE CORRECT.

Read the excerpt from "Deep Listening Brings Rewards."

Cold and crouched in snow in the remote backcountry of the park with microphones and recording gear to the ready, the Colorado State University (CSU) scientists waited and listened. Silence. Then...the stealthy sound of crunching footsteps approaching.

"There were lots of animals, and they were getting closer. They were circling us..."

Which word below could best be used to replace the word stealthy without changing its denotative or connotative meaning?

A.
quiet
B.
secretive
C.
sneaky
D.
clever