Which Unity Pro feature allows you to combine multiple sprite elements into a single sprite sheet?

Which of the following statements is false?

a. If a program uses multiple classes from the same package, these classes can access each other's package access members directly through references to objects of the appropriate classes, or in the case of static members, through the class name. b. Package access is rarely used. c. Classes in the same source file are part of the same package. d. Use the access modifier package to give a method or variable package access.

____________________ is another word for a picture element.

Fill in the blank(s) with the appropriate word(s).