Which of these excerpts from Margaret Frink's memoir most clearly shows that her story is told in the first person?

A. The Carsons had two wagons, with four horses to each, having bought more horses at Ragtown, after losing their mules . . .
B. Away from the river, the soil is hard and dry, void of any vegetation except sage-brush, which is worthless for any purpose but fuel.
C. Whenever we come to grass that can be mowed, Mr. Frink has the men cut a good supply of it with the scythe . . .
D. Much of the slope between the mountains and the river is covered with sage-brush.