Diagnostic colonoscopy through stoma; with collection of specimen by washing

Which of the following is a guideline for protecting against possible secondary devices?

A. Evacuate all personnel as quickly as possible B. Anticipate their presence at illicit laboratories C. Use multiple personnel to examine the scene D. Move items carefully if they might conceal an explosive device

A decrease in the signal-to-noise ratio (SNR) means that there has been a decrease in the noise signals in comparison to the desired signals

Indicate whether the statement is true or false.