Answer:
please provide more details.
fAnswer: A new source of high quality denim fabric
Explanation:
A shift from PPF1 to PPF2 would suggest a new improvement due to technology, innovation or raw material. Here a new source of high quality fabric would result in more and better production of fabrics.
Answer:
C. sending emails impersonating legitimate companies in an attempt to learn a recipient's personal information
A pro of HCI technology is that its user friendly and a con about it is that you have to teach the user what to do or guide them!