Alka-Seltzer Was Made Originally a Hangover Remedy That Cured the Headache

Alka-Seltzer was made originally a hangover remedy that cured the headache and settled the stomach.Today, you can purchase Original Alka-Seltzer, Extra Strength Alka-Seltzer, Alka-Seltzer Morning Relief (for morning headaches and fatigue) , and Alka-Seltzer Heartburn Relief.To extend the product's sales to new markets, the makers of Alka-Seltzer have used

A) a market-product strategy.
B) product modification.
C) market modification.
D) diversification.
E) product extension.