What are the domain and range of f(x) = 4x – 8?

A. domain: {x | x is a real number}; range: {y | y > –8}
B. domain: {x | x is a real number}; range: {y | y > 8}
C. domain: {x | x > 4}; range: {y | y > –8}
D. domain: {x | x > –4}; range: {y | y > 8}