Patients who feel they have a good relationship with their doctors gen

My understanding behind the casual logic is this:

The question is a strengthen CR, we want the answer that provides the most support to main conclusion. I understand the main conclusion as: Patients who feel they have a good relationship with their doctors generally show more improvement . We want to find new information that supports this conclusion.

(A) Patients are more likely to take legal action against a doctor for malpractice if they believe that the doctor failed to establish a connection with them during their office visits.
Logic issue -> While there is an argument this could strengthen the idea that a good relationship shows sign of improvement, this implies that a doctor must establish a good relationship while the question stem uses hedging words such as feel and generally . This also does not mention any information about patient recovery time.

(B) Recently, medical schools and health insurers have taken measures to improve doctorpatient communication.
Not relevant -> Does not explain why they have taken these measures.

(C) Doctors who work in stressful environments are much less likely to take the time to connect with patients than doctors in more relaxed settings.
Not relevant -> Does not mention any link between patient improvement and personal connection. Similar to B, if we had more info that being less likely to connect caused less improvement, this could be correct.

(D) The average physician spends about 15 minutes with each patient during routine office visits.
Not relevant -> No new information about personal connection or patient improvement

(E) A large number of studies have confirmed that the more anxious a patient is, the more protracted his or her recovery from a medical condition is.
Correct answer -> Directly links back to patient recovery. At first glance it does not seem to relevant to question setting, however we can see from the question: Patients who like their doctors show improved emotional well-being, are less anxious about their symptoms. Here we can see the question is directly addressing anxiety in patients and showing that patients with more anxiety had a longer recovery period. Increased level of patient anxiety = longer recovery time
This strengthens the argument we can see from the question: personal connection with doctors = less anxiety = improved recovery time

Cheers