For which of the following inequalities is x greater than or equal to 4 a solution?
Ax + 3 is greater than or equal to 1
B3x is greater than or equal to 1
Cx - 3 is greater than or equal to 1
Ax + 3 is greater than or equal to 1
B3x is greater than or equal to 1
Cx - 3 is greater than or equal to 1