All except for C are spam. But the tru meaning of span is
A. Unsolicited messages from unknown individuals trying to solicit money or information.
Bob is just a human like us and feels stuff, its probaly due to his environment and pressures/stress but heck who really knows. Bob is Bob. and that is that.
E. adobe ruins because the adobe is a native american tribe. a cultural landscape is an area of geographic land that has cultural impact. the other answers are simply environments.
