Which is the BEST revision of sentences 4 and 5? (question on usa test prep)

A) Helpful is a list of contents with recommended periodic checks and updates. B) You should really have a list of contents and check it as often as possible. C) A list of contents is helpful, and periodic checks and updates are recommended.
D) Each chest should have a list of contents and should periodically be checked and updated.

paragraph

Excerpt from Home Emergencies
Carole Jenkins

(1) Many people have never thought about what they would do when faced with a home emergency, such as a tornado, a hurricane, or a fire. (2) People get scared and don't act right. (3) Being prepared in case of emergencies can reduce the risk of danger and prevent panic should emergencies occur.

(4) Each home should have an emergency chest that all family members can locate in the time of need. (5) A list of contents is helpful, and periodic checks and updates are recommended. (6) Suggestions for things to include in the chest:

Emergency telephone numbers (such as 911, police, fire, doctors, poison control, relatives, and neighbors)
Information relating to the health needs and medications of family members
A first-aid kit
A battery operated radio
A fire extinguisher
A hot water bottle
An ice pack