In order for Say’s law to hold in a money economy, the classical economists argued that saving is matched by an equal amount of investment because of:
a. wage flexibility.
b. price flexibility.
c. money flexibility.
d. interest rate flexibility.
e. b and c

Interest rate flexibility

Explanation:

According to classical economists, there is an inverse relationship between the amount of funds invested by firms and the interest rate.

In a money economy, for Say's law to hold, the funds that are saved must give rise to equal amount of funds invested. Because to the Classical Economists belief in interest rate flexibility, they argued that saving will be matched by equal amount of investment.