Which of the Following Is Not a Flow Variable

Multiple Choice

Which of the following is not a flow variable?

A) the amount of spending by consumers this holiday season
B) the number of times a dollar bill is spent in a day
C) the amount of sales taxes collected in a state per year
D) the number of shares of stock traded on Wall Street per week
E) the $100 Susan keeps in her purse,in case an emergency arises