blank is the most restrictive access modifier that will allow members of one class to have access to members of another class in the same package.Public Synchronized Protected Abstract Default Access

The most restrictive access modifier that will allow members of one class to have access to members of another class in the same package is "protected".

Here's a step-by-step explanation:

1. "Public" is the least restrictive access modifier. It allows a member to be accessed from any other class anywhere, whether they are in the same package or have been imported from a different package.

2. "Protected" allows the class itself, all the classes in the same package, and all subclasses of the class (even if they are in a different package) to access the member.

3. "Default" (no modifier) allows the class itself and all other classes in the same package to access the member, but not classes in different packages.

4. "Private" is the most restrictive access modifier. It allows only the class itself to access the member.

5. "Synchronized" and "Abstract" are not access modifiers, they are used for different purposes in Java. "Synchronized" is used to control the access of multiple threads to any shared resource. "Abstract" is used to declare a class that cannot be instantiated or a method that has no implementation.

So, the answer is "protected". It is more restrictive than "public" and "default", but less restrictive than "private".