Final answer:
When a defense lawyer wishes to question a crown witness on the stand, the process is known as cross-examination. This is a critical aspect of a trial as guaranteed by the Sixth Amendment.
Step-by-step explanation:
When a defense lawyer wishes to question a crown witness on the stand, it is called B. Cross-examination. During a trial, after the prosecution has conducted their direct examination of their witnesses, the defense is given the opportunity to cross-examine them. The purpose of cross-examination is to challenge the credibility and the facts presented by the witness, perhaps revealing inconsistencies or biases in their testimony. The Sixth Amendment guarantees the right for the defense to cross-examine witnesses brought by the prosecution.