An the answers are...

1. Answer B is correct. The AMEX is most noted for its listing of oil and gas companies, foreign stocks, and options. A dually listed NYSE security cannot be listed on the NYSE and AMEX, but rather would be on the NYSE and a regional exchange.

2. Answer C is correct. Dually listed securities can only be listed on a major exchange such as the NYSE and one of the numerous regional exchanges across the country. A dual listing cannot occur on two major exchanges such as the NYSE and AMEX or the NYSE and the OTC market.

3. Answer B is correct. There are only two major exchanges in the United States, the NYSE and AMEX. Both of these exchanges are located in New York and are considered auction markets.