In many cases the encryption or safeguard on an e-card in the form of a three digit code on the back. It is also known as CVV or card verification value. It is a security feature for “card not present” payment.
Answer:
inattentional deafness
Explanation:
Richard failed to respond to auditory alarms (roomate's question) under high workload situations(reading a mystery novel). This failure, termed inattentional deafness, is often attributed to high workload when involved with visuals as a result, which reduces one's capacity for information processing
It included silk road and road map
