フリー問題

問題文

A script builds a file path from a variable that sometimes contains a space, and the command fails only for those values. What is the correct fix?

選択肢

1. Quote the literal path at the point of expansion and check the value against the returned status code before use.
2. Quote the literal path at the point of expansion and check the value against the allowed value list before use.
3. Quote the variable reference at the point of expansion and check the value against the returned status code before use.
4. Quote the variable reference at the point of expansion and check the value against the allowed value list before use.