After a morning filled with interruptions like the construction crew jack hammering outside their window, the writers were consumed by story deadlines. Everyone was typing like mad at his or her computer, trying to finish everything before the end of the day. Suddenly, a loud burst of laughter broke their concentration. One of the sales managers was hosting a meeting with his team nearby, and their noisiness was driving the writers nuts. Along with shattering the silence, the sales team had also derailed many trains of thought. John was so upset he just put his head down on his desk next to his keyboard. $"$T$\text{'}$ll never finish with this story in time. My deadline is $5$ p$.$m$.,"$ he said. When the noise from the conference room quieted down, a huge sigh of relief echoed across the floor. "Finally!" John said. Lisa shook her head in agreement, "I couldn't even hear my own thoughts." The returned silence helped people wind down and clear their minds. The click$-$clack of computer keys once again filled the room as the writers resumed their work. At this rate, I may be able to make it home in time to catch my favorite shows, Lisa thought to herself. Just as creativity began flowing freely, the sales people got loud again. Finally, one writer had enough of all the noise! She jumped up from her computer and headed toward the meeting room to have a little talk with the sales manager.

The word "nuts: in line five means:

a$.$ Unfocused

b$.$ Insane

c$.$ Things we eat like seeds

d$.$ Rational