Which of the Following Is True About Possession of Collateral

Which of the following is true about possession of collateral by secured party as public notice?

A) Change of possession is a convenient way for perfecting most security interests in consumer goods.
B) Possession of collateral by the creditor is rarely executed to perfect a security interest in chattel paper and negotiable documents of title.
C) Possession is a possible way of perfecting a security interest in inventory which is achieved through a field warehousing arrangement.
D) Possession by the creditor is a practicable way of perfecting a security interest in equipment or farm products.