All Things Being Equal, Which of the Following Children Is

Multiple Choice

All things being equal, which of the following children is MOST likely to have older siblings?

A) ​Joe, who is very popular with his peers and who is very innovative.
B) ​Steve, who conforms easily to his parents' and other adults' requests.
C) ​Martin, who has known from his middle-school years that he is "destined" to go to college.
D) ​Herb, who earned a very high score on a recent administration of an intelligence test.