There is a sentence that is missing in the paragraph below. Look at the paragraph and decide where (option $1, 2, 3$, or $4$) the following sentence would best fit.
Sentence: The brain isn't organized the way you might set up your home office or bathroom medicine cabinet.
Paragraph: $\_\_\_(1)\_\_\_$. You can't just put things anywhere you want to. The evolved architecture of the brain is haphazard and disjointed, and incorporates multiple systems, each of which has a mind of its own. $\_\_\_(2)\_\_\_$ . Evolution doesn't design things and it doesn't build systems-it settles on systems that, historically, conveyed a survival benefit. There is no overarching, grand planner engineering the systems so that they work harmoniously together. $\_\_\_(3) \_\_\_$ . The brain is more like a big, old house with piecemeal renovations done on every floor, and less like new construction. $\_\_\_(4)\_\_\_$.
- Option $2$
- Option $4$
- Option $1$
- Option $3$