[MUST SHOW WORK] Jada used to pay $20 for a book. She bought 4 books per month. When the price of a book rose to $25, a 25 percent increase, Jada stopped buying books altogether. Jada's price...

Extracted text: [MUST SHOW WORK] Jada used to pay $20 for a book. She bought 4 books per month. When the price of a book rose to $25, a 25 percent increase, Jada stopped buying books altogether. Jada's price elasticity of demand for books using the simple formula is Select one: O A. 1. O B. 4.5. O C. 4. O D. zero. O E. infinity.