<p><a href="As">quote</a> children mature, they develop (an independence) that their parents, who (have been) responsible for them since they were born, often find difficult (to accept). (No error)
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<p>The correct answer is E, no error.</p>
<p>However, I don't understand why B, an independence, is correct. Why is independence single, when clearly the children are plural? </p>
<p>Thanks in advance for your help!</p>