Olivia is single, 66 years old, and not blind. She paid all the cost of keeping up her home. She earned $55,000 in wages for 2019. Olivia provided all the support for her two grandchildren who lived with her all year. Cora is 11 years old and Jack is 15 years old. She does not have enough deductions to itemize. Olivia, Cora, and Jack are all U.S. citizens with valid Social Security numbers. 1. What is the amount of Olivia's standard deduction? A. $18,350 B. $ 20,000 C. $ 24,400 D. $ 25,700