Question

if you were to look in your wallet right now, you might be lucky enough to find some money. even though credit and debit cards are more popular than ever, most people still carry around a few bills with them. paper money is something we are all familiar with, but is it really made out of paper? regular paper is made out of wood cellulose, which is a product that comes from trees. paper - making chemicals with the wood to break it down into cellulose fibers. machines then press these fibers together and roll them into thin sheets to create the material we call paper. when paper gets wet, the cellulose fibers become very weak. this can cause most paper to completely fall apart when it is wet. according to the passage, rag paper a falls apart when it is wet b comes from trees c is mostly made of cotton d is not very different than the paper you write on

Explanation:

The passage mentions that when rag paper gets wet, the cellulose fibers become very weak and this can cause it to fall apart.

Answer:

A. falls apart when it is wet