Answer: The answer is D (Mr. Johnson will earn $140 for 12 hours of work
Explanation:
So with process of elimination we can safely say that for every hour Mr. Johnson will earn 12$.
So it is true that *A* e(amount earned)= 12h($12 made per hour)
And if *B* Mr. Johnson makes $12 per hour then in 4.5 hours he will make $54
We also know for a fact *C* Mr.Johnson earns $12 per hour
but in 12 hours Mr. Johnson will make $144 not $140 so *D* is incorrect