The rules of writing 'if-then-else', 'case-switch', 'while-until' and 'for' control flow statements are called _____ .

The rules of writing 'if-then-else', 'case-switch', 'while-until' and

1.	The rules of writing 'if-then-else', 'case-switch', 'while-until' and 'for' control flow statements are called _____ .
A.	Comments
B.	Functions
C.	Line length and wrapping
D.	Control Structure
Answer» E.