Help with Kalani 70-320 Training Guide question on XML schemas

In the exam questions for chapter 1 of Kalani's 70-320 training guide
there is a question about XML schema files that I do not understand.
Here is the question and answer:

You have been assigned the task of developing an XML schema file to
serve as part of the data later of your company's new Web application.
The application will deliver details on sporing events to
subscribers. Each sporting event is characterized by several peices
of information, including the date, sport, and teams involved. What
should you use to represent a sporting event in the XML schema?

A. Complex type
B. Simple type
C. Element
D. Attribute

The answer is A. Explanation: Because the sporting event will contain
several pieces of information, it is best represented as a complex
type. The sonstituent pieces of information within this type can be
represented by elements, attributes, or simple types.

I understand that B is wrong because simple types are used to define
constraints for element values and I see that D is wrong because the
sporting event has more than one piece of data associated with it. My
question is - what is the difference between A and C? An element can
contain several pieces of information can't it? When I look at the
XML behind the schema created in the step by steps I see that all of
the elements are children of an <xs:complexType> element. This is not
really explained in the book and MSDN only says that a complex type
"determines the set of attributes and the content of an element". Can
someone give me a more thourough explanation of what a complex type is
and how it relates to an element and this question?

 

element and attributes are xml grammer

<sport>basketball</sport> is an element..
<sport team="NBA"></sport>
team here is the attribute.

so if you have xml like
<sport>
<name>basketball</name>
<teams>9</teams>
</sport>

how can you represent it with a schema.. consider that the above is a class.
Would Sport be a primitive type ? or could you write a custom class which
would have different fields representing the different properties of that
sport ?
its a complex type or a custom class.. that my friend is the reason why its
A.

For the reason above it cannot be B and since we are talking about XML
Schema and not XML in general it cannot be C or D

--

Regards,

Hermit Dave
(http://hdave.blogspot.com)