In order to promote creativity in their teams, the managers at Pixar have the employees conduct $\_\_\_\_\_\_\_\_\_($during which they share work in progress frequently and give each other feedback to improve and expand their ideas$)$ and $\_\_\_\_\_\_\_\_($during which they celebrate successes and discuss what they could have done better at the end of every project$).$

a$.$

Brain Trust; Dailies

b$.$

Dailies; Brain Trust

c$.$

Brain Trust; Post$-$mortems

d$.$

Dailies; Post$-$mortems