c )
Step-by-step explanation:
To find equivalent inequalities, we are looking to isolate x on the left side.
a) x < 4 
b) x -1 < 3 add 1 to both sides  x -1 +1 < 3 +1 result x < 4 
c) x + 1 < 4 subtract 1 from both sides x + 1 -1 < 4 -1 result x < 3 
d) x - 2 < 2 add 2 to both sides x - 2 +2 < 2+2 result x < 4