Which diagram can be used to prove △ABC ~ △DEC using similarity transformations?

Question and answers are in the attached picture. you so much in advance.

Do some research and find a city that has experienced population growth. determine its population on january 1st of a certain year. write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a period of exponential growth. describe the variables and numbers that you used in your equation.

Iknow the answer but the calculator doesn't seem to give the right one