<p>Can someone please answer this and leave an explanation? Thanks.</p>
<p>We should make out decision regardless (of whether we will be able to take immediate action to implement it.)</p>
<p>A. of whether we will be able to take immediate action to implement
B. of if we can act immediately by its implementation
C. of whether or not we can act immediately on implementing them
D. of whether we can implement them by immediate action
E. of if we could implement it by immediate action</p>
<p>I think the answer is A.</p>
<p>The sentence seems correct as it is. First, you can rule out B and E since regardless should be followed by whether.
C and D have “them” which cannot refer back to anything.</p>
<p>A seems grammatically sound to me.</p>
<p>Ah, okay. </p>
<p>So, to answer this question, I just needed to know that “whether” HAS to follow “regardless”?</p>
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<p>Not necessarily. Whether does not have to follow regardless. However, I think I can make a conclusion that if can never follow regardless in this manner. (I’m actually not 100% sure about this, but I don’t think “regardless of if” is grammatical.)</p>