When the gross domestic product is neither growing nor shrinking a country's economy is doing which of the following:
a. producing
b. stagnating
c. inflating
d. expanding

it would be B

Explanation:

Because stagnating means not to move

B. Stagnating.

Explanation:

According to the dictionary Stagnant means without inflow and outflow. Used in economics it refers to a period of little or no growth. Usually, if the numbers are lesser than 3% annually it is considered a stagnated economy.

It is marked by periods of high unemployment.

I hope this answer helps you.