I would think its the "<span>requirements analysis" phase.
Because the </span>requirements analysis<span>,</span><span> is the process of determining user expectations for a new or modified product.</span>
        
             
        
        
        
Answer:
The answer to this question is given below in the explanation section. The correct answer is B.
Explanation:
The purpose behind to explore an integrated development environment is to learn more about the features of the environment. 
So the correct answer is B. 
For example, you can use visual studio to build asp.net application using c#, then you need to explore what features visual studio offering to you. 
However, other options are incorrect. Because, you can learn more about syntax, error handling, and abstraction in the programming language, not in the IDE. 
 
        
             
        
        
        
A backdoor is a typically covert method of bypassing normal authentication or encryption in a computer, product, embedded device (e.g. a home router), or its embodiment (e.g. part of a cryptosystem, algorithm, chipset, or even a "homunculus computer" —a tiny computer-within-a-computer such as that found in Intel's AMT technology).Backdoors are most often used for securing remote access to a computer, or obtaining access to plaintext in cryptographic systems. From there it may be used to gain access to privileged information like passwords, corrupt or delete data on hard drives, or transfer information within autoschediastic networks.
the answer is True
i hope it will help you