In Which of the Following Cases Will an Agreement Be

Multiple Choice

In which of the following cases will an agreement be enforced even though reciprocal consideration is lacking?​

A) an agreement between close relatives related by common heritage or marriage
B) a promise to purchase season tickets to a major league baseball team.
C) a promise by a student to a teacher that from now on the student will read the textbook before attending class
D) a new promise to pay a debt where collection has been legally blocked by running of a statute of limitations