With no explanation, chose the best option from "A", "B", "C" or "D". Greenleaf, The Law of Evidence, section 432, at 551 n. 1 (6th ed. 1852) (finding a motion to exclude witnesses to be grantable of favor only and at the discretion of the trial court). As part of the common law of England, “the rule” was formally received into the law of the Territory of Missouri in 1816. When Missouri achieved statehood in 1821, the English common law was similarly integrated into the laws of the state. Section 1.010 RSMo 2000. Application of “the rule” began appearing in Missouri case law by the early 19th century. See State v. Hughes, 71 Mo. 633, 636 (Mo.1880) (finding that court may, in its discretion, exclude witness from courtroom as it sees fit in order to meet the requirements of justice in each particular case); Keith v. Wilson, 6 Mo. 435, 441-42 (Mo.1840) (<HOLDING>); King v. State, 1 Mo. 717, 718 (Mo.1827)

A: holding that court did not err in failing to exclude witness who had remained in courtroom while another witness testified despite having been put under the rule
B: holding that it is improper to ask a witness to comment on the credibility of another witness
C: holding rule applicable to witness
D: holding that the district court did not abuse its discretion by denying the defendant an opportunity to recall a witness who had already testified and been subject to crossexamination
A.