If a Challenged Witness Is Found by the Court to Be

If a challenged witness is found by the court to be competent to testify:

A) this automatically makes the evidence offered competent.
B) it does not necessarily mean that all of the evidence that may be offered by that witness is competent.
C) it is then not necessary to consider the relevancy and materiality hurdles.
D) evidence from that witness is admissible because the rules relating to the competency of the evidence and the competency of the witness are the same.