Doctor or teacher or an engineer
A server can have many definitions, but in this particular case, the answer is A.
<span><span>STR stands for Short Term repeat. It is </span>a region of a DNA molecule that contains short segments of three to seven repeating base pairs</span>
<span>Hundreds of different types of STR's are found in the human genomes.</span>
Answer: A. Usability testing
Explanation:
Usability testing would be the correct answer because if the user interface isn't "frendly" then people won't be able to use it properly. Or if you are refering to the word friendly as looking safe, then even more so would be usability testing. Because if people don't like the fonts and styles of the user interface, they might not use it at all.
When providing instructions or rule to follow, it is important to make them as clear as possible. Simple commands follow by an example (when possible) are basic steps to deliver a precise massage.
Another thing is to bare in mind who is receiving the instruction. The receptor should be apt to the plan knowing vocabulary, structures, etc.
Last but not least, check if the receptor understood the plan, double check if you think it is necessary
