What will be the result of attempting to parse the string "123abc" as an integer?

When attempting to parse the string "123abc" as an integer, the process will identify that the string contains non-numeric characters following the numeric portion. Most programming languages and libraries that handle integer parsing follow a strict format when converting strings to integers. They expect the string to be entirely composed of digits, as any deviation—like the presence of letters—indicates that the string cannot be interpreted as a valid integer.

In this case, since "123abc" contains alphabetic characters, the parser recognizes this as an invalid input for conversion to an integer and throws an exception at runtime. This behavior is consistent across many programming environments, making option B the correct choice. Parsing failures due to invalid formats trigger exceptions to alert the programmer of the issue, necessitating proper error handling in the code to manage such scenarios gracefully.