(Choose 1 answer)
What is wrong with the classes used in this button code?<a href="#" class="btn btn-default btn-xs" role="button" aria-pressed="true">
A. .btn-default class was renamed to .btn-secondary in version 4
B. .btn-xs class has been removed in version 4 and you can use .btn-sm instead
C. The .btn class should be button
D. The first two are correct
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