All defendants in federal felony cases are entitled to a grand jury, but the practice of a grand jury in state cases varies; in some states, grand juries are ______. Group of answer choices not used for the most part, while in other states they are always used widely used regardless of the circumstances while in other states they are required to be used in certain circumstances impermissible, while in other states prosecutors have the discretion to decide required to be seated in certain circumstances, while in other states prosecutors have discretion to decide