Arrange the following theories in chronological order starting from oldest to latest:
(A) Keynesian Theory of Demand for Money
(B) Quantity Theory of Money
(C) Cambridge Cash Balance Approach
(D) Modern Quantity Theory of Money
Choose the correct answer from the options given below:
Rearrange the following parts to form a meaningful and grammatically correct sentence:
P. a healthy diet and regular exercise
Q. are important habits
R. that help maintain good physical and mental health
S. especially in today's busy world