E is correct. The two generally accepted scales for psychosocial evaluation of organ transplant candidates are the Psychosocial Assessment of Candidates for Transplantation (PACT) and the Transplant Evaluation Rating Scale (TERS). More recently, the Stanford Integrated Psychosocial Assessment for Transplant (SIPAT) has also been utilized, though with mixed evidence as to its ability to predict clinical outcomes. None of these scales include the availability of the donor, which varies widely by organ.

Publication reference : Presberg BA, Levenson JL, Olbrisch ME, Best AM. Rating scales for the psychosocial evaluation of transplant candidates. Comparison of the PACT and TERS with bone marrow transplant patients. Psychosomatics. 1995 Sep-Oct;36(5):458-61.
Reference URL: https://www.ncbi.nlm.nih.gov/pubmed/7568653
Publication reference : Maldonado JR, Sher Y, Lolak S, et al. The Stanford Integrated Psychosocial Assessment for Transplant (SIPAT): a prospective study of medical and psychosocial outcomes. Psychosomat Med 2015; 77:1018-30.
Reference URL: https://www.ncbi.nlm.nih.gov/pubmed/26517474