The length of the interval of solutions of the inequality a \leq 2 x+3 \leq b is 10 . What is b-a ?

**Answer Choices**

A. 6

B. 10

C. 15

D. 20

E. 30

The length of the interval of solutions of the inequality a \leq 2 x+3 \leq b is 10 . What is b-a ?

**Answer Choices**

A. 6

B. 10

C. 15

D. 20

E. 30