Adding and subtracting with scientific notation, find the sum of 4.06 × 10¹⁹ and 5.034 × 10¹⁷.
a) 4.6134 × 10¹⁹
b) 4.6134 × 10³⁶
c) 4.6134 × 10³⁷
d) 46.134 × 10¹⁸