Detective Dan Just Completed a Lengthy Investigation into a Complex

Detective Dan just completed a lengthy investigation into a complex embezzlement case involving gourmet food trucks at a local outdoor market. During his surveillance he noted that sales were frequently made without using the cash register and that it was common for the person taking orders from customers to commingle money from sales with personal funds. Prosecutor Paula decided to take the case to the grand jury instead of having a preliminary hearing. What is the advantage of doing this?

A) The burden of proof is lower
B) She can cross examine the defense witnesses
C) The defense attorney will not be there
D) All of the above are true about a grand jury hearing