Which of the Following Transactions Would Be Decided Under the Sale

Which of the following transactions would be decided under the Sale of Goods Act?

A) Marco sold a bicycle to Tara. Although she received the bike immediately, she did not pay any money. She gave a cheque to Marco for $400.
B) Marco sold a bicycle to Tara. Although she received the bike immediately, she did not pay any money. She allowed Marco to charge $400 to her credit card.
C) Marco sold a bicycle to Tara. Although she received the bike immediately, she did not pay any money. She promised to pay $400 in cash within six months.
D) Marco sold a bicycle to Tara. Although she received the bike immediately, she did not pay any money. She gave her old bike to Marco and promised that she would pay $100 within six months.
E) all of the above