What is the solution set Select the correct choice below and

What is the solution set? Select the correct choice below and, if necessary fill in the answer box within your choice. (Type an integer or a simplified fraction.)

Solution

|3x+9|<=0

case 1: 3x+9 <=0

x<=-3

case 2: -3x -9 <=0

3x+9>=0

x>= -3

Combining the ranges we get : x= -3

Option A : x= -3