Read the following excerpt from a US court opinion:
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fair opportunity to obtain the assistance of counsel of his choice to prepare and conduct his defense,” that "constitutional mandate is satisfied so long as the accused is afforded a fair or reasonable opportunity to obtain particular counsel, and so long as there is no arbitrary action prohibiting the effective use of such counsel." United States ex rel. Carey v. Rundle, 409 F.2d 1210, 1215 (3d Cir.1969). The record shows that Jackson had ample opportunity to retain counsel of his choice, and the District Court's refusal to further postpone his trial date was not arbitrary. 3 . Some cases add a requirement to the first prong o'f the test that the purpose is "at issue,” though others have not incorporated this requirement. Compare United States v. Brown, 765 F.3d 278, 291 (3d Cir.2014) , and United States v. Caldwell, 760 F.3d 267,
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What is the most suitable continuation to the opinion? Your options are:
A. holding that the federal action at issue must be authorized
B. holding that deposition testimony offered in opposition to a motion for summary judgment in a medical malpractice case must reveal that the witness is competent to testify as to the matters at issue
C. holding that evidence must be offered for a proper nonpropensity purpose that is at issue in the case
D. holding that proponent of 404b evidence must identify a proper 404b purpose for admission  that is at issue in  the case
E. recognizing that other crimes evidence may be admissible if offered for any nonpropensity purpose and identifying the need to provide necessary background information about the relationships among the players as a proper purpose
Reply with [A, B, C, D, E] only.