The criminal charges involving Peanut Corporation of America relating to Salmonella:
a. Involve criminal fraud.
This statement is accurate. The Peanut Corporation of America faced criminal charges primarily related to fraud. The company was accused of knowingly shipping peanut products contaminated with Salmonella, putting consumers at risk. The intentional nature of these actions constitutes criminal fraud.
Therefore, option "a. Involve criminal fraud" is the correct answer. It's crucial to understand the severity of such actions and their implications on public health and safety.