Answer: B.) Change the period into a comma.
When you think about words such as summer and friendship, usually you would have positive emotions relating to those words. Summer is the time when there's no school, and when you can spend a lot of time with your friends, which makes you happy. Thus, those words will create B. a positive mood.
sand is uncountable and school is countable.
Friendship is a theme best represented within this passage.
