we have that
case A) -13 < 15
this inequality does not describe the two numbers -13 and 28 and the number 28 to the right of -13
case B) -13 < 28
this inequality describes the two numbers -13 and 28 and the number 28 to the right of -13
case C) 15 < -13
this inequality does not describe the two numbers -13 and 28 and the number 28 to the right of -13
case D) 28 < -13
this inequality does not describe the number 28 to the right of -13
the answer is
case B) -13 < 28