ABC Development Corp. has rated the parcels in its residential project. The most desirable parcels are rated as A lots, and the least desirable are rated as D lots. ABC's pre$-$printed contracts specify that a buyer purchasing an A lot must also sign a contract to purchase a C or D lot. Which of the following statements is correct?

Select one:

a$.$ This is a tie$-$in contract and is therefore a violation of law

b$.$ This is not a tie$-$in because ABC is only selling its own property

c$.$ This is not a tie$-$in because the $2$ transactions are in separate contracts

d$.$ This is a tie$-$in but would not be a violation if the seller is financing both pa