In Which One of the Following Situations Is a Chose

In which one of the following situations is a chose in action (intangible property) given as security by a debtor to the creditor?

A) A dentist assigns her accounts receivable to the bank that lent her money for the purchase of a business.
B) Mr. Jason grants a chattel mortgage on the family car to secure repayment of money borrowed for a trip.
C) A programmer pawns his computer.
D) A farmer gives his future crop to the bank as security for the repayment of money borrowed for seed.
E) Jeff buys a piano under a conditional sale contract.