A retired 65-year-old individual is married, has no dependents, and holds a part-time job that pays $19,000 per year. The individuals spouse is 69 and blind. The individual also has corporate bonds that pay interest income each year. What is the minimum amount of interest the corporate bonds must pay for the individual to be required to file income taxes for 2021?

a. $6,101

b. $9,501

c. $10,151

d. $11,201