Which of the following is not an example of a barrier to entry?
a. mighty mitch’s mining company owns a unique plot of land in tanzania, under which lies the only large deposit of tanzanite in the world.
b. a novelist obtains a copyright for her new book.
c. a taxi cab driver in new york city obtains a license to legally provide transportation in new york city.
d. a college student starts a part-time tutoring business.

Exercise 4-6 the following balances were taken from the books of alonzo corp. on december 31, 2017. interest revenue $86,000 accumulated depreciation—equipment $40,000 cash 51,000 accumulated depreciation—buildings 28,000 sales revenue 1,380,000 notes receivable 155,000 accounts receivable 150,000 selling expenses 194,000 prepaid insurance 20,000 accounts payable 170,000 sales returns and allowances 150,000 bonds payable 100,000 allowance for doubtful accounts 7,000 administrative and general expenses 97,000 sales discounts 45,000 accrued liabilities 32,000 land 100,000 interest expense 60,000 equipment 200,000 notes payable 100,000 buildings 140,000 loss from earthquake damage 150,000 cost of goods sold 621,000 common stock 500,000 retained earnings 21,000 assume the total effective tax rate on all items is 34%. prepare a multiple-step income statement; 100,000 shares of common stock were outstanding during the year. (round earnings per share to 2 decimal places, e. g. 1.48.)