单选题Which is the earliest line in the following code after which the object created on the line marked （0） will be a candidate for being garbage collected， assuming no compiler optimizations are done？ （） public class Q76a9 { static String f（） { String a = "hello"； String b = "bye"； // （0） String c = b + "!"； // （1） String d = b； b = a； // （2） d = a； // （3） return c； // （4） } public static void main（String args[]） { String msg = f（）； System.out.println（msg）； // （5） } }AThe line marked （1）.BThe line marked （2）.CThe line marked （3）.DThe line marked （4）.EThe line marked （5）.
单选题
Which is the earliest line in the following code after which the object created on the line marked （0） will be a candidate for being garbage collected， assuming no compiler optimizations are done？ （） public class Q76a9 { static String f（） { String a = "hello"； String b = "bye"； // （0） String c = b + "!"； // （1） String d = b； b = a； // （2） d = a； // （3） return c； // （4） } public static void main（String args[]） { String msg = f（）； System.out.println（msg）； // （5） } }
A
The line marked （1）.
B
The line marked （2）.
C
The line marked （3）.
D
The line marked （4）.
E
The line marked （5）.
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