Correct option is D
The correct match is:
A-IV: J. Crowe & K.W. Scheuber → Principles of International Humanitarian Law
B-III: Charlotte Lülf → Conflict of Displacement and Legal Protection
C-II: Mathilde Crépin → Persecution International Refugee Law and Refugees: A Feminist Approach
D-I: Dieter Fleck and Michael Bothe → The Handbook of International Humanitarian Law