Which of the Following Transactions Would Take Place in the "Underground

Multiple Choice

Which of the following transactions would take place in the "underground economy"?

A) Elizabeth tells her mother she's going to work but really goes to see a movie.
B) Paul buys 15 gallons of gasoline for $3.29 a gallon,not realizing that $1.50 per gallon of that price goes to the government as tax revenue.
C) John makes chain-link belts and necklaces and sells them at a local flea market for cash to avoid paying taxes.
D) Matt bought an iPad for $499 but decided to sell it on eBay instead of keeping it.