First Principles Thinking: governing standard
A is correct. The governing standard is that performance information must be fair, accurate, and complete, while the competing concern is that a short marketing piece may omit detail. The curriculum resolves that tension by permitting brief presentations if the member makes the detailed supporting information available on request, with best practice being to note the limited nature of the summary. Here, the manager uses a composite of similar portfolios, discloses that results are gross of fees, and signals that fuller information is available. Those facts support a fair summary rather than a misleading one, so the conduct is most likely not a violation.
Why top distractor is tempting but wrong (missed nuance). B is tempting because full detail often reduces misunderstanding, but the standard does not require every brief communication to contain all underlying support in the same document.
Why remaining distractor fails (boundary violation). C fails because the curriculum requires disclosure of whether results are gross, net, or after tax; it does not state that gross returns are forbidden when clearly identified.