Which statement best describes the role of epinephrine in local anesthetics at a 1:100,000 concentration?

Which statement best describes the role of epinephrine in local anesthetics at a 1:100,000 concentration?

• A. 1:100,000 concentration contains more epinephrine per volume and provides greater vasoconstriction and longer duration than 1:200,000
• B. 1:100,000 concentration contains less epinephrine per volume than 1:200,000
• C. Both concentrations provide identical effects
• D. 1:200,000 provides greater vasoconstriction and longer duration

Answer: (A)