________ are a common way for Web site visitors to communicate with the Web site's owner

A(n) _________ is a visual model used to plan a database

Fill in the blank(s) with correct word

Member access specifiers (public and private) can appear:

a. In any order and multiple times. b. In any order (public first or private first) but not multiple times. c. In any order and multiple times, if they have brackets separating each type. d. Outside a class definition.