A:100cab%
B:100ca+b+c%
C:100c(a−b)(a−c)%
D:100(a−c)a+b−0.5c%
— How old is Mary?
— She is having her______ birthday this weekend.
of,on,and,again,help
— It's fine today, Jim. Shall we go to the zoo?
— ______.