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

How to plan the perfect trip using libertrip 
Sign-up to start building. 
Signing up gives you free and unlimited access to your own personal, easy-to-use, trip planning timeline. 
Choose where you want to go and start building.

Choices:
(a). Maxing out that space means splitting it up into 2 separate destinations. A big flat area like the park is best since there will be lots of people there, whereas a beach or campground would look unproductive.;
(b). Look for someplace with lots of options, like a mountain river or lake that will require lots of resources. These areas often have more resources and potential trip planning for the traveling travelers to learn.;
(c). Search among thousands of destinations or explore a database of itineraries for inspiration. Once you've decided where to go, libertrip click on' start new trip' and libertrip will assist you in creating a timeline in five easy steps.;
(d). The location you select for your trip will allow you a choice of airlines you can fly to. Have your passport available, and have at least one i.d.;
(c).