Answer: Option D
When choosing a source language, there are several factors that need to be taken into consideration. Let's examine each of the options to understand why all of the above are important:
A. Programmer skill: The knowledge and expertise of the programmer in a particular programming language can have a significant impact on the choice of source language. If the programmer has strong skills in a particular language, it may be more efficient and practical to use that language for the project. On the other hand, if the programmer is not familiar with a language, it may take more time and resources to complete the project.
B. Language availability: Availability of a particular programming language is another crucial factor in selecting a source language. Some languages are more widely available and supported than others, which can make them more accessible and easier to work with. Language availability can also affect the availability of development tools, libraries, and community support for the language.
C. Program compatibility with other software: Compatibility with other software can be important in determining the choice of source language. The language used should be compatible with other software systems used in the project, such as database systems, web servers, or other libraries. If the language used is not compatible with other software, it may result in issues during integration, resulting in delays and increased costs.
In conclusion, all of the above factors - programmer skill, language availability, and program compatibility with other software - are important considerations when choosing a source language. Each factor can have a significant impact on the development process and the success of the project. Therefore, option D is the correct answer.