Multi-choice problem: Continue writing the next sentence in this paragraph:

How to buy boxes for packing 
Use smaller boxes for heavy items. 
The mistake most people make is to fill larger boxes with heavy items like books, cds, and cans. Get smaller boxes for them.

pick from the following. (i) The items are dense, so you'll spare yourself some pain by lifting only small boxes. Small boxes measure approximately 1.5 cubic feet (.; (ii) As you visit your local store or b&b, ask for help in measuring boxes for heavier items. Weigh the lid to avoid letting loose air inside.; (iii) Choose lighter boxes or get bigger boxes in larger sizes. Boxes made of materials like newspaper or recycled denim aren't the best place to store valuables.; (iv) This way, you have to fill them more accurately to avoid half-size boxes overflowing. Think about what you would want in a medium-sized box and how much you would want for heavier items.;
(i)