Which sentence should be rewritten to improve the clarity of the paragraph?

driving to the fair was a troublesome, difficult situation today. we planned on leaving at 5: 30 p. m., which was unfortunately during rush hour. the traffic would be horrible and we did not want to be stuck. we decided to consult a map in an attempt to find an alternative route.
a. sentence 1, b. 2nd sentence, c. 3rd sentence, d. 4th sentence

Me read the letter. dear aunt mary, you for the wonderful painting. you are so talented! i was thrilled that you chose to paint horses. you must have remembered that i was crazy about horses when i was a little kid—and i still love them. i have hung the painting in my room so that i can see it every morning when i wake up. your loving niece, celia what makes this letter appropriate for its intended audience? it is written from the third-person point of view. it is concise and impersonal. its sentence structure is varied. its language is informal.