This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to relax on an airplane
Choose your preferred airline.
Make sure that the airline's seats have a seat pitch just right for you and that there is some forms of entertainment provided for you (especially for long flights). If there is no entertainment for you, bring your own forms of entertainment such as books or a tablet to keep you awake.

Select from the following. i. Make sure that the airline of your choice does not have too many stopovers. Also ensure that the duration of the stopover is no longer than 5 hours.; ii. Anything that will keep you occupied will occupy you at a low-stakes, long-term pace. Think about what you want to relax on and consider each choice.; iii. Take photographs of everyday activities in the cabin. A passport, sunglasses, paper clips, cell phone, laptop and some magazine pages can be great entertainment.; iv. But be sure not to bring anything that would disrupt your sleep. Once you have your favorite book ready to read, take a nap or invest in an excellent quality sleep aid.;
The answer is:
i.