which statement must be inserted at line 42?

Given an HttpServletRequest request and an HttpServletResponse response:
41. HttpSession session = null;
42. // insert code here
43. if(session == null) {
44. // do something if session does not exist
45. } else {
46. // do something if session exists

47. }
To implement the design intent, which statement must be inserted at line 42?

A.
session = response.getSession();

B.
session = request.getSession();

C.
session = request.getSession(true);

D.
session = request.getSession(false);

E.
session = request.getSession(“jsessionid”);

Explanation: