A．How different kinds of pepper are produced.
B．Why white pepper is superior to dishes.
C．How the pepper plant is grown.
D．How various peppers are used in cooking.

A．How she is able to look younger and more energetic than her age.
B．What is the best age of one’’s life and how she feels about her age.
C．How people in their 20s and 30s differ in their attitudes toward what to do with their lives.
D．Why people buy expensive face creams and if they really work.