What Is the Design Phase in the SDLC

What is the design phase in the SDLC?

A) involves establishing a high-level plan of the intended project and determining project goals
B) involves analyzing end-user business requirements and refining project goals into defined functions and operations of the intended system
C) involves describing the desired features and operations of the system
D) involves placing the system into production so users can begin to perform actual business operations with the system