; (B) modules for inclusion in the appropriate surveillance systems, as described in subparagraphs (C) and (D) of paragraph (1); and (C) how the Centers for Disease Control and Prevention can utilize data collected through surveillance systems to target specific populations or geographic locations with a high incidence of measured Adverse Childhood Experiences, including by considering such data when awarding grants and contracts to entities serving such populations or locations. 303. Government accountability study on barriers to and opportunities for trauma-informed identification and treatment (a) Study (1) In general The Comptroller General shall conduct a study of the barriers to, and the opportunities for increasing, the early identification and treatment of children and youth, and their families as appropriate, who have experienced or are at risk of experiencing trauma. (2) Contents In conducting the study, the Comptroller General shall examine— (A) ways in which such identification and treatment could be facilitated in early childhood education and care settings and elementary and secondary schools, such as through improved teacher preparation, professional development, and curriculum design, and the development of the cognitive and social-emotional skills of students; (B) (i) the extent to which State Medicaid plans use early and periodic screening, diagnostic, and treatment services (as defined in section 1905(r) of the Social Security Act ( 42 U.S.C. 1396d(r) ) that are provided in accordance with the requirements of section 1902(a)(43) of such Act ( 42 U.S.C. 1396a(a)(43) )) to provide trauma-informed services to children and youth, and their families as appropriate, who have experienced or are at risk of experiencing trauma; (ii) barriers to increased utilization of such screening, diagnostic, and treatment services; and (iii) the impact of State Medicaid plan design and State regulatory decisions on the provision of such services