If you are trying to correct it, the answer would be...
While visiting Washington, D.C., we went to the Lincoln Memorial and the Vietnam Memorial.
Hello.
The best written sentence is A. My favorite day of the year is July 24th--my birthday.
After reading the summary of "In the Rockpilei" it has become clear that the word which accurately describes Roy is definitely 'disobedient'. I choose this one because he didn't behave and just stole away, leaving all the responsibility on his brother. Hope you will agree with me, regards!