People go on a trip mainly for leisure time. They go to spend time with friends and family, get healthier and stronger by example, going for hiking, bicycling and so forth. Sometimes, people go for educational reasons. Maybe to take a test, to develop more skill on a particular subject.
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What are the other options? You only gave Angels...
a because after 2 you need a camma and also you dont need a comma after 2010
The main action a writer takes when proofreading is fixing errors.