⇒Since it is given that variable m should be the one to be used,
it is said that Zach is 4 years older⇒ than twice his sister Maya`s age.
⇒As indicated Maya`s age is m
⇒Twice Maya`s age is 2×m=2m
Therefore Zach`s age is 2m+4
The expression given by the given scenario is 2m+4
⇒It is the expression that can help us find the exact ages of the Zach and Maya
⇒First Option is the answer.