Mary uses Gradient Descent Learning to train a neuron. She repeats the weight updates for $5$ iterations $($i$.$e$.,$ epochs$).$ She plots the classifier lines at every iteration in the figure shown below. i represents the iterations. She also plots the learning curve $($i$.$e$.,$ cost function,

$).$

Which of the plots $($A$-$D$)$ shown on the right$-$hand side can represent the learning rate for this training? Note that the dots on the A$-$D plots indicate where the learning curve intersects with one of the axes.