At what point (x,y) in the plane are the functions below continuous? a. f(x.y)= sin (x+y-3) b. f(x.y) = In (x+y - 1) a. Choose the correct answer for points where the function sin (x +y-3) is continuous. O A. for every (x,y) such that x2 0 O B. for every (x,y) such that x+ y-3> 0 O C. for every (x.y) such that y >0 O D. for every (x,y) b. Choose the correct answer for points where the function In (x +y-1) is continuous. O A. for every (x,y) such that x> 1 and y >1 D. for every (x.y) such that x +y >1 O C. O B. for every (x,y) such that x +y