Per chapter $14,$ which two statements below were discussed comparing leaders to managers?

a$.$ Leaders are in charge, while managers are responsible or results.

$$ b$.$ Leaders have innate traits to motivate employees, while managers are trained to motivate employees.

$$c$.$ Leaders focus on vision, mission, goals and objectives, while managers focus on productivity and efficiency.

d$.$ According to the late business professor Warren Bennis, the primary difference between leaders and managers is that leaders are concerned with doing the right thing, while managers are concerned with doing things right.