IP Multimedia Subsystem<span> or </span>IP Multimedia<span> Core Network </span>Subsystem<span> (</span>IMS) is the term that refers and describes<span> an architectural framework for delivering IP multimedia services.
</span>IMS is a standards-based architectural framework <span> defined by the 3rd Generation Partnership Project (3GPP) </span>for delivering multimedia<span> communications </span>services such as voice, video and text .
If a user would like to modify margins to specific settings, users would need to select the <span><u>Custom Margins</u> </span>option.
I think that A could be the correct answer. The others are not as credible as A.
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I hope this helps you :)
