One of the biggest problems with informants is A. that their reliability is often highly questionable. b. In most cases, officers have manufactured informants. c. Generally speaking, informants tend to be cost-prohibitive d. "Confidential informants" are usually more trustworthy than witnesses.

A

Explanation:

Bencaustic for an imformant you never know if they can be relied on so there not as trust worthy as someone you know

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