This Korean-style English grammar question is so bull. Care to look at this for a moment?

Test Preparation SAT Preparation
1

<p>Error identification</p>

<ol>
<li>Attention span varies with age, A[with] older children capable of longer periods of attention B[than younger] children. In addition, people are generally capable of a longer attention span C[when] they are doing something that they D[find it enjoyable] or intrinsically motivating. </li>
</ol>

<p>Answer is D. I mean SAT wise, shouldn’t the answer be B because it’s faulty comparison?</p>

2

<p>D is wrong because it should be “find enjoyable.”</p>

3

<p>B is not grammatically incorrect because it is comparing older children with younger children.</p>