[Solved] Which pattern of cash flow stream is the most difficult to use when evaluating projects? A) annuity B) nonconventional flow C) conventional flow D) mixed stream Abnormal: Diverging from what is considered normal or typical; often used to describe conditions or behaviors that are outside the statistical norm. Autoerotic Asphyxiation: A dangerous sexual practice involving the intentional restriction of oxygen to the brain for the purposes of enhancing sexual arousal and orgasm. Sexual Masochistic: Pertaining to a paraphilia where sexual arousal and gratification depend on experiencing pain or humiliation. Collar: A part of a garment that encircles the neck, typically varying in style and width.