1 inch (2.54 cm
the default top and bottom margins were 1 inch (2.54 cm), but 1.25 inches (3.17 cm) were given at the left and the right.
That's standard for document size by default.
Its A. this one is so easy for me ;)
Answer:
Logic Classes
Explanation:
There are three classes in a three-tiered architecture, which are:
1) Presentation classes
2) Logic Classes
3) Data Classes
Hence, the middle layer is the Logic classes.