Find the Domain and Range of the Relation $\{ - 20 , - 10,0,10,15 \}$

Multiple Choice

Find the domain and range of the relation. Use interval notation where appropriate.

A) domain: $\{ - 20 , - 10,0,10,15 \}$ ; range: $\{ 0 , - 20 , - 40,20 \}$
B) domain: $[ - 20,15 ]$ ; range: $[ - 40,20 ]$
C) domain: $\{ 0 , - 20 , - 40,20 \} ;$ range: $\{ - 20 , - 10,0,10,15 \}$
D) domain: $[ - 40,20 ]$ ; range: $[ - 20,15 ]$