a. Angela, age 19 and single, has $7,500 of wages, S500 of interest, and $375 of self-employment income. O A. Angela must file because her gross income exceeds the threshold of $4,300. OB. Angela need not file because her gross income is less than the threshold of $12,400 and her self-employment income is less than $400. C. Angela need not file because her gross income is less than the threshold of $12,400 and her self-employment income is less than $1,100. OD. Angela must file even though her gross income is less than the threshold of $12,400 because her self-employment income is greater than $200. b. Brenda, age 87 and single, has a taxable pension of 53,600 and Social Security benefits of 50, 100 (the Social Security benefits are wholly tax-exempt in this situation). A. Brenda must file as her gross income exceeds the limit of $1,850. OB. Brenda need not file, as her gross income is less than $24,800. C. Brenda need not file, as her gross income is less than $14,050. OD. Brenda need not file, as her gross income is less than $12.400. c. Carl, age 15 and single, is a dependent of his parents. Carl has earned income of $1.500 and interest of $525. O A. Carl must file, as his gross income of $2,025 exceeds his standard deduction of $1,850 OB. Carl must file, as his gross income of 2,025 exceeds his standard deduction of S1,100. OC. Carl need not file because his gross income of $2,025 is less than the threshold of $4,300 OD. Carl need not file because his gross income of $2.025 is less than the standard deduction of $12.400. d. Deb, age 15 and single, is a dependent of her parents. She has earned income of $650 and interest of $1,500. A. Deb must file because her unearned income is over $1,100, even though her total gross income is less than the standard deduction of $12.400. OB. Deb need not file because her total gross income is less than the threshold of $12,400. OC. Deb must file because her unearned income is over $1,100 and her total gross income exceeds her standard deduction. OD. Deb must file because her unearned income is over $1,100, even though her total gross income is less than the threshold of S4.300. e. Dylan, age 25 and his wife are separated. He earned $5.400 while attending school during the year. O A. Dylan must file because his gross income is over $6 and he is married and not living with his spouse. OB. Dylan need not file because his gross income is less than the threshold of $12.400. OC. Dylan need not file because his gross income is less than the standard deduction of S24,800. OD. Dylan must file because his gross income is over $1,100 and he is married and not living with his spouse