Here’s the rule’s defined term for “working owner”: 29 C.F.R. § 2510.3-55(d)(2) https://www.ecfr.gov/current/title-29/part-2510/section-2510.3-55#p-2510.3-55(d)(2). (In reading the rule, recall that it’s an interpretation of ERISA title I’s definition for an employer.)
Observe that an owner need not have any minimum hours of service to be treated as a working owner. It’s enough that an owner has wages from the employer or self-employment income from the deemed employer.
A confusion might result from the compound question’s use of a negative and a disjunctive.
And that’s ignoring the sentence’s logically inconsistent uses of plurals and singulars.
Although my thinking might be worthless and is useless, I concur with your thinking that A, B, C, and D each describes a “working owner” as the rule defines that term.
Is there time to ask the Office of the Chief Accountant what EBSA seeks with this question?