Which is the best explanation of the relationship between social media goals and social media metrics?

Multiple choice question.

There are metrics that correspond to the most common social media goals and that serve as key$-$performance indicators $($KPIs$)$ for them.

Organizations share many of the same social media goals, but each organization must devise its own metrics to monitor their performance.

Progress toward basic social media goals can be monitored using metrics, but more difficult goals call for KPIs.