To answer this question, you need to understand the different protocols used for handling incoming email messages.
Option A) POP3 and IMAP servers - This option is correct because both POP3 (Post Office Protocol version 3) and IMAP (Internet Message Access Protocol) servers are used to handle incoming email messages. POP3 servers store emails on the server until they are downloaded to the client device, while IMAP servers store emails on the server and allow the client device to access and manage the emails remotely.
Option B) Web and FTP servers - This option is incorrect because web servers and FTP (File Transfer Protocol) servers are not directly involved in handling incoming email messages. Web servers are used to host websites, while FTP servers are used for file transfers.
Option C) POP3 and FTP servers - This option is incorrect because while POP3 servers are used to handle incoming email messages, FTP servers are not directly involved in email handling. FTP servers are used for file transfers.
Option D) FTP servers and IMAP - This option is incorrect because while IMAP servers are used to handle incoming email messages, FTP servers are not directly involved in email handling. FTP servers are used for file transfers.
Therefore, the correct answer is A) POP3 and IMAP servers.