What day follows the day before yesterday if two days from now will be Sunday

A．the practice of making people obey rules and punishing them when they do not follow the system of rules or m a particular activity
B．a branch of knowledge
C．the quality of always behaving or working in a controlled way
D．training which produces obedience or self-control

A．learning about how people solved problems
B．asking people to describe what they have in their minds
C．using computers to stimulate thought
D．recording mental processes of problem-solving