Answer:
Option A.
Explanation:
Let Bill and Ellen can spend amount on dinner = $x
Tip on this amount = 15% of x = $0.15x
Now the maximum amount they can spent = x + 0.15x = 1.15x
and 1.15x = 65
x =

x = $56.52
Therefore, Bill and Ellen can spent maximum $56.52 on dinner.
Option A is the answer.