Today's U.S. currency contains a number of security features, including which of the following:

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Quizplus · Accepted Answer

All of the choices listed are indeed security features found in today's U.S. currency. Off-center portraits with added detail, color-shifting ink, watermarks visible when held to light, and security threads whose locations change with the denomination are all measures designed to prevent counterfeiting and ensure the authenticity of the currency.

Today's US