Arianna claims that the rectangles shown below are similar, while miguel claims that they are not similar.

whose claim is correct and why?
a
miguel is correct because the two rectangles are not oriented in the same direction.

b
arianna is correct because the four angles of the smaller rectangle are the same as the four angles of the larger rectangle.

c
arianna is correct because the smaller rectangle has side lengths that are half the size of the side lengths of the larger rectangle.

d
miguel is correct because the measures of the sides of the smaller rectangle are not proportional to the measures of the sides of the larger rectangle.