Who has been on the court the longest? What year did that justice take his/her seat? Who is the newest justice? What year did he/she join the court?

Who has been on the court the longest? William O. Douglas.

On March 20, 1939 he was nominated by Roosevelt.

The current chief justice is John Roberts. He was sworn into office on September 29, 2005.

i would say b. research typically uses a variety of sources

fertile good for trade etc