Valentine, holiday, and birthday inherit from the class card. in order for the following code to be correct, what type must the reference variable card be? card = new valentine( "a", 14 ) ; card. greeting(); card = new holiday( "b" ) ; card. greeting(); card = new birthday( "c", 12 ) ; card. greeting();

The variable card must be of type Card

Explanation:The reference has to be of the same type of the class. In this case, there are many diferent classes and the common one is Card, as all inherit from it.

answer; the above statement is (true) ;

parts of an essay — traditionally, it has been taught that a formal essay consists of three parts: the introductory paragraph or introduction, the body paragraphs, and the concluding paragraph. an essay does not need to be this simple, but it is a good starting point.