Erick added Nayib's stocks and got 52.5 x 10^6. He emailed his colleague, Samaria, to check his work. She said his addition is fine but he has to change 52.5 x 10^6 so that it is in perfect scientific notation. What is 52.5 x 10^6 in perfect scientific notation?

A.5.25 x 10^7
B.525 x 10^5
C.5.25 x 10^5
D.5.25 x 10^6