If a sample has an activity of 2 curies, how many disintegrations per second does it undergo?

• A. 2.1 × 10⁹ disintegrations per second
• B. 3.7 × 10¹⁰ disintegrations per second
• C. 7.4 × 10¹⁰ disintegrations per second
• D. 1.85 × 10¹⁰ disintegrations per second

Answer: (C)