B the blue arrows in a circle because it shows that they all connect to each other.
Answer is number one Rule
<span>For the first time in decades, Baby Boomers have been outnumbered by another group—the Millennials.</span>
The answer is conditional and subjunctive moods.
The conditional mood is used to talk about improbable situations and circumstances which depend on some condition.
For example: <em>If all wars were ended, the world would be a happier place.</em>
The subjunctive mood is used to describe wishes and hypothetical conditions.
For instance: <em>I wish all wars were ended. </em>
