Read the following context and choose the best option to answer the question.
Context: The only thing she and I disagree about ! ) I met her through Booking Through Thursday , a terrific meme for those who love reading . We stayed in touch not just on Thursdays but throughout the week . She always has something interesting going on in her world . Carol and I just clicked , and I feel that if we were next door neighbors , we 'd be BFF ( best friends forever ) !
Question: What may be the reason why these people are friends ?
Options: 
- They have a lot in common .
 - They drive the same car .
 - None of the above choices .
 - They challenge each other with different views .


They have a lot in common .