§ 1271 of the Evidence code Question. Does the below need all a-d or just a will do?

§ 1271. Admissible writings Evidence of a writing made as a record of an act, condition, or event is not made inadmissible by the hearsay rule when offered to prove the act, condition, or event if: (a) The writing was made in the regular course of a business; (b) The writing was made at or near the time of the act, condition, or event; (c) The custodian or other qualified witness testifies to its identity and the mode of its preparation; and (d) The sources of information and method and time of preparation were such as to indicate its trustworthiness. Section 1271 is the business records exception to the hearsay rule.