Explanation:
Post-emergency evaluations - A
Actions required - B
Periodic testing - C
Training - D
This question relates to ISO 14001:2015 Clause 8.2 - Emergency preparedness and response , which requires an organization to establish, implement, and maintain processes needed to prepare for and respond to potential emergency situations.
The correct matching is:
Post-emergency evaluations # to implement corrective actions
After an emergency or emergency drill, the organization should review what happened, evaluate the effectiveness of the response, and take corrective action where weaknesses or failures are identified.
Actions required # to mitigate impacts
Emergency planning must define actions needed to prevent or reduce adverse environmental impacts, such as spill containment, isolation of hazardous materials, shutdown procedures, or notification of relevant parties.
Periodic testing # of emergency plans
Emergency response arrangements should be tested periodically where practicable, for example through drills, simulations, or spill-response exercises.
Training # of emergency response personnel
Personnel involved in emergency response must be trained so they understand their roles, responsibilities, communication routes, and response procedures.
The two unused options - communication processes and including contact details - may be relevant to emergency planning generally, but they do not best complete the four statements shown in this question.

According to ISO 14001:2015:
Clause 6.1.2 & 6.1.4 (Environmental aspects and planning actions): demolition impacts must be identified and controlled (C).
Clause 8.1 (Operational planning and control): control of outsourced processes (supervision and contract requirements) (B, E).
Clause 9.1.2 (Compliance obligations): regulatory approvals for demolition (H).
The subcontractor ' s internal policies (A, D, F, G) are generally not part of XM ' s EMS obligations.
Reference: ISO 14001:2015 Clauses 6.1.2, 6.1.4, 8.1, 9.1.2.