A Good Way to Convert a String Such a ^"572"

Multiple Choice

A good way to convert a string such a ^"572" to an equivalent integer such as ⁵⁷²

A) is to use the C- library function ^itoa.
B) is to use an ^{ostringstream} object and the ex traction operator ^>>.
C) is to use an ^{ostringstream} object and the insertion operator ^<<.
D) is to use an ^{istringstream} object and the extraction operator ^>>.
E) None of the above