Given the following code: Which of the following lines indicates the start of code branching?

Line 1 would typically be the start of a program, a variable declaration, or a comment, not branching.

Line 2 would likely be part of initial setup, variable declaration, or sequential execution before any branching occurs.

Assuming line 4 contains a conditional statement like an 'if' or 'switch' statement, this line would mark the beginning of code branching. Code branching allows the program to execute different blocks of code based on whether a specified condition evaluates to true or false.

Line 10 would be a later line in the code, likely within a branched block or after it, but not the start of the branching logic itself if line 4 is the starting point.