Final answer:
The MATLAB command that creates a plot with the specified requirements is option b.
Step-by-step explanation:
The correct MATLAB command that creates a plot with the specified requirements is option b: plot(x,y,'m','o','LineWidth',2,'MarkerSize',12,'MarkerEdgeColor','g','MarkerFaceColor','y')
This command uses the 'm' argument to set the line color to magenta, the 'o' argument to set the marker shape to circles, 'LineWidth',2 to set the line width to 2 points, 'MarkerSize',12 to set the marker size to 12 points, 'MarkerEdgeColor','g' to set the edge color of the markers to green, and 'MarkerFaceColor','y' to set the filling color of the markers to yellow.