<p>Hello.. </p>
<p>I have a writing question from the BB. </p>
<p>[Crossing and recrossing] the stream, stepping on or over slipper rocks, and [following] a trail [that grew] steeper and steeper, the hikers soon realized [how challenging] their day would be.</p>
<p>The Answer is No Error. </p>
<p>I picked no error, but I had another question in mind: Since the hikers realizED (an past action), wouldn't "that grew" be past perfect? (past of the past, so "had grown") ..Or did I overcorrect it..?</p>