Final Answer:
When assessing a child's perception of a difficult issue, appropriate methods of assessment include written questionnaires (Option B) and verbal interviews (Option C).
Step-by-step explanation:
Physical examination (Option A) and laboratory tests (Option D) are generally not directly applicable for assessing a child's perception of a difficult issue. For emotional or psychological assessments, written questionnaires and verbal interviews are more suitable. Written questionnaires provide a structured format for children to express their thoughts, feelings, and perceptions in a confidential manner. Verbal interviews, conducted by a skilled professional, allow for open communication and exploration of the child's perspective. These methods can provide valuable insights into the child's emotional well-being, helping professionals better understand and address difficult issues affecting the child.
Options B and C are the answer.