{{u}}DirECtions:{{/u}} in thE Following quEstions, ChoosE thE BEst AnswEr From thE FivE ChoiCEs listED、

An opErAtion, *, is DEFinED As Follows: For Any positivE numBErs A AnD
B、 whiCh oF thE Following is An intEgErA、11*5
B、
B、4*9
C、4*16
D、7*4
E、9*9