The $y$-intercepts of three parallel lines are $2,3,4$, and the sum of their $x$-intercepts is 36. Then the slope of these three parallel lines is

• Correct answer
  A

  $-\frac{1}{4}$
• B

  $-\frac{1}{2}$
• C

  $-\frac{1}{3}$
• D

  $-\frac{1}{6}$

Hence, the correct answer is option: 'A'.