Which of the following would be most appropriate for the nurse to include in the plan of care for a dying child to meet the child's emotional needs during the last days of life

A．Restrict visitors to the parents to avoid overtaxing the child.

B．Answer the child's questions about illness and death honestly.

C．Focus on the child's physical needs to attempt to prevent sadness.

D．Encourage the child to play quietly with a roommate to provide pleasure.

简述小麦印度腥黑穗病病原菌。