Large Scale Scrum $($LeSS$)$ uses certain discerning principles, such as systems thinking, whole product focus and transparency, and it adds to Scrum the following techniques: Choose all that apply.

a$.$

Risk Management

b$.$

Sprint planning is more formally divided into two parts of what and how

c$.$

Overall retrospectives focus on cross$-$team improvements

d$.$

Organizational change management

e$.$

Organic cross$-$team coordination

f$.$

Overall cross$-$team refinement