When a cellular telephone user places a call, the carrier transmits the caller’s voice as well as the voice of the person who is called. The encoded voices are the data of the call. In addition to transmitting the data, the carrier also stores metadata. The metadata of the call include information such as the time the call is placed and the phone numbers of both participants. For which of the following goals would it be more useful to computationally analyze the metadata instead of the data?
I. To determine if a caller frequently uses a specific wordII. To estimate the number of phone calls places next Monday between 10:30 AM and noonIII. To generate a list of criminal suspects when given the telephone number of a known criminala. I onlyb. II onlyc. II and III onlyd. I, II, and III