Jimmy’s age is one year less than the sum of the ages of his siblings Serena and Tyler. Which equation represents Jimmy’s age?
A. look at the picturex represents Tyler’s age, y represents Serena’s age, and z represents Jimmy’s age
B. look at the picturex represents Jimmy’s age, y represents Tyler’s age, and z represents Serena’s age
C. look at the picturex represents Serena’s age, y represents Jimmy’s age, and z represents Tyler’s age
D. look at the picturex represents Jimmy’s age, y represents Serena’s age, and z represents Tyler’s age