The highlights of a good textbook are that
I. They contain numerous exercises to give rigorous practice.
II. All concepts can be introduced through situations.
III. Solved examples are included.
IV. They must be thick and heavy.

Options

A. They contain numerous exercises to give rigourous practice.
B. All concepts can be introduced through situations.
C. Only solved examples are included.
D. They must not be thick and heavy.
c and d
a and d
b and d
a and b

Answer

D