Answer
$ D=F\lt A\lt B\lt C\lt E $
Work Step by Step
According to Faraday's law, $\epsilon=-N.\frac{\Delta \phi}{\Delta t}$, but $\phi=BAcos\theta $. The graph indicates the change in the magnetic field with respect to time, hence $\frac{\Delta\phi}{\Delta t}$ is proportional to $\frac{\Delta B}{\Delta t}$ which means the greater the $\frac{\Delta B}{\Delta t}$, the greater will be the $\frac{\Delta \phi}{\Delta t}$. As a result, we get a greater induced emf $\epsilon $.
Thus, we can show the required order of increasing induced emf as: $ D=F\lt A\lt B\lt C\lt E $
