Which of the following statements is false?

a. Most classes you’ll use in Java programs must be imported explicitly.
b. There’s a special relationship between classes that are compiled in the same directory. By default, such classes are considered to be in the same package known as the default package.
c. Classes in the same package are implicitly imported into main.
d. An import declaration is not required when one class in a package uses another in the same package.

c. Classes in the same package are implicitly imported into main. Actually, classes in the same package are implicitly imported into the source-code files of other classes in that package.