What is the correct sequence of selected key deliverables across the project phases?

Your project is performing some high-level planning for a System Conversion journey from SAP Business Suite to SAP S/4HANA on-premise edition.

What is the correct sequence of selected key deliverables across the project phases? Please choose the correct answer.
A . a) Code adjustment
b) Detailed System Assessment
c) Production Readiness Check
d) Validation of Migration
B . a) Production Readiness Check
b) Detailed system Assessment
c) Code Adjustment
d) Validation of Migration
C . a) Detailed system Assessment
b) Code Adjustment
c) Validation of Migration
d) Production Readiness Check
D . a) Detailed system Assessment
b) Production Readiness Check
c) Code Adjustment
d) Validation of Migration