. For the years 2016 through 2020 (inclusive) Maryo, a best-selling author, has been involved in operating a book store. In 2016 and 2017 his revenue exceeded the expenses from the activity. In 2018, 2019 and 2020, the book store generated a loss. Which statement is correct?

A) The activity is a business. The IRS cannot prove it is a hobby.

B) The activity is a hobby. Maryo cannot prove it is a business.

C) The activity is presumed to be a hobby. However, Maryo may prove it is a business.

D) The activity is presumed to be a business. However, the IRS may prove it is a hobby.