Musa and James are friends who work for a financial services organisation. Musa wants to start a stockbroking company that buys and sells equities on the Johannesburg Stock Exchange with the money he has saved over the past five years. While owning a business has advantages, it also has certain disadvantages. How many of the following options do not represent an advantage of owning a business? 

a. flexibility

b. demanding 

c. profit earning 

d. learning 

e. autonomy