The correct answer is A. Joanne C. Hashen.
The Insert method inserts a specified string into a string at a specified index. The index is zero-based, so the first character in the string has an index of 0. In this case, the Insert method is being used to insert the string “C.” at index 7. This means that the character “C.” will be inserted after the seventh character in the string, which is the “n” in “Hashen”. The resulting string will be “Joanne C. Hashen”.
Option B is incorrect because it does not include the “C.” after the “n” in “Hashen”. Option C is incorrect because it does not include the “Hashen” at the end of the string. Option D is incorrect because it does not include the “Joanne” at the beginning of the string.