Irrelevant. This may be true, but it doesn’t support the assumption that a defendant’s own lawyer can be present during questioning. The principle described in (A) has nothing to do with why the plaintiff’s request cannot be granted.

If defendants have the right to have their lawyer present during questioning, the plaintiff can't be permitted to question a defendant without their codefendant’s lawyer being there, since two codefendants share a lawyer.

Irrelevant. This may be true, but it has nothing to do with whether defendants’ lawyers can be present during questioning. Whether the defendants refuse to answer certain questions doesn’t affect the plaintiff’s request.

Even if this is true, it doesn't affect the plaintiff’s request. The plaintiff is being denied his request to question each defendant without their codefendants or their codefendants’ lawyers present. But the defendants never made this request, nor were they denied this right.

Irrelevant. The plaintiff is making a request about questioning the defendants. The defendants’ lawyers never requested to question the plaintiff. (E) doesn’t support the assumption that a defendant’s own lawyer can be present during that defendant’s questioning.