What passive transformation expresses the speculation about the rock star's wife?

The answer that best expresses speculation about the rock star's wife is rooted in the phrase "is said to have had." This construction indicates that there is some kind of rumor or report regarding her experiences, suggesting a level of uncertainty or speculation about the situation.

This form is often utilized to reflect statements that are circulating without confirming their truth, allowing for the presentation of potentially unverified information. The passive voice here emphasizes the idea that people are talking about this subject rather than asserting definitive knowledge about it, which aligns well with the nature of speculation.

The other options provide similar structures, but they might lean towards different nuances of speculation or conviction, which is why "is said to have had" is the most fitting choice for general speculation.