The correct answer for this question is this one: "a. wireless local area network (WLAN)."
<span>The technology that is predominately used for contactless payment systems is called the </span><u>wireless local area network (WLAN)</u><u />. It is even used now a days.
Hope this helps answer your question and have a nice day ahead.
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I try to search the answer but I couldn't find it
I believe a metal detector would be a fine choice for an employee entrance.
