We’re told here that these points lie on a line and that lines divided into three segments, the longest segment being RS which has a value of 4. Since two of the three line segments have to be less than 4, the answer choices for A,B,C, and D. are unacceptable because each of these would require three line segments of at least 4 or more. Therefore 10 is the only acceptable answer. E is the correct answer.