A theory ?_x005F_x000D_I- is a systematic explanation of relationships between economic variables_x005F_x000D_II- explains causal relationships among variables_x005F_x000D_III- provides a basis for policy_x005F_x000D_IV- provides an explanation of all factors influencing economic growth.

A theory ?_x005F_x000D_I- is a systematic explanation of relationships

1.	A theory ?_x005F_x000D_I- is a systematic explanation of relationships between economic variables_x005F_x000D_II- explains causal relationships among variables_x005F_x000D_III- provides a basis for policy_x005F_x000D_IV- provides an explanation of all factors influencing economic growth.
A.	I only
B.	I and II only
C.	I , II and III only
D.	IV only
Answer» D. IV only