Previous studies have shown that most people are unaware of many of the privacy settings for their apps, or aren't comfortable with the permissions they consented to at some earlier point. It's clear that many people just can't cope with the complexities of privacy settings associated with the apps they have on their smartphones. Meanwhile, the growing number of other smart devices will impact privacy as well and make it even more challenging for users to retain control over their data and understand how it is being used.Norman Sadeh, professor of computer science in Carnegie Mellon University, has been working on a research that suggests a personalized privacy assistant app being developed can simplify the chore of setting permissions for smartphone apps. The privacy assistant can learn the user's preferences and quickly recommend the most appropriate settings, such as with which app to share the user's location, or contact list.The privacy assistant can ________.A. make smartphones easy to useB. recommend how to use appsC. help with privacy settingsD. learn users' preferences in life