Homework: Section 15.1 Homework Question 2, 15.1.17 HW Sco O Poir Find the domain of the following function. f(x,y)= /4 - 4x² - 4y? Select the correct choice below and, if necessary, fill in the answer box(es) to complete your choice. O A. {(x,y): x +y?s } O B. {(x,y): x* and y# }(Use a comma to separate answers as needed.) OC. {{x,y)-x? +y? 2 } OD. {(x,y) x² +y? + O E. R2