Fact 1: Alight bulb is used for seeing in the dark.

Fact 2: Evening had arrived quickly, and it was almost too dark for the old man to see where to step safely.

Given the two facts above, answer the question "a light bulb is used for seeing where to step what?" with the following options: 
- feet
 - move
 - lightly
 - dangerously
 - quickly
 - two
 - safely
 - down


 

       safely  