With the Rise of Social Media, Two Major Challenges Facing

With the rise of social media, two major challenges facing marketers today are __________.
keeping up with the changing technology and learning how to use it
keeping up with changing technology and choosing the best ones to use
understanding how to use the tools in a way that achieves marketing goals and measuring the effects of social media programs
understanding how to use the tools in a way that achieves marketing goals and interpreting the information gathered
measuring the most effective tools for use and measuring the effects of social media programs