Answer and Explanation:
C is a low level language and does not have classes. The language isn't based on object oriented programming(OOP) but is actually a foundation for higher level languages that adopt OOP like c++. Using c++ programming language we can implement the class, flower, with its three variables/properties and functions/methods since it is an object oriented programming language.
 
        
             
        
        
        
Unsought goods. 
Nobody seeks them out, because no one wants them.
        
             
        
        
        
Answer:
b. ISO 9000
Explanation:
ISO 9000 can be defined as a quality system standard is a three-part, continuous cycle of planning, controlling, and documenting quality in an organization.
This ultimately implies that, the ISO 9000 is a set of standards that typically guides an organization in ensuring that they meet both the stakeholders and consumer requirements or needs with respect to their products and services under statutory and regulatory requirements at a specific period of time. 
 
        
             
        
        
        
Answer:
Because of the nature of the source systems ETL functions are challenging.Reasons are as following:-
1. There are various source systems are very  and contrasting.
2. There is usually a requirement to deal with source systems on different platforms or Operating Systems.
3. Quality of data is uncertain in many old source systems that have developed gradually over time.