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.
The correct answer to this question is A. One level or record an be returned in a single query when a developer writes a SOQL query to find child records for a specific parent.
To indicate which program is needed to open it