Which statement correctly explains how kasi should find a solution to the following system of linear equations using elimination?
-4g-15h=-17
-g+5h=13

Below are the choices that can be found from other source:

a: she can multiply the bottom equation by –4 and then add the equations to solve for h. 
b: she can multiply the bottom equation by 4 and then add the equations to solve for h. 
c: she can add 17 to both equations to set –4g – 15h equal to zero. 
d: she can subtract 13 from both equations to set –g + 5h equal to zero

the answer is a. 

-4g - 15h = -17 [top equation] 
4g - 20h = -52 [bottom equation, multiplied by -4] 
-35h = -69 [sum of the two equations eliminates g]