Which of the following shows the correct sequence for the order of$$ operations?

A$.$

Evaluate all exponential expressions$$ first, do all multiplications and divisions from left to$$ right, and then do all additions and subtractions from left to right.

B$.$

Do all calculations within grouping symbols$$ first, evaluate all exponential$$ expressions, do all multiplications and divisions from left to$$ right, and then do all additions and subtractions from left to right.

C$.$

Do all calculations within grouping symbols$$ first, do all multiplications and divisions from left to$$ right, do all additions and subtractions from left to$$ right, and then evaluate all exponential expressions.

D$.$

Evaluate all exponential expressions$$ first, do all calculations within grouping$$ symbols, do all multiplications and divisions from left to$$ right, and then do all additions and subtractions from left to right.