The correct answer is A.
In the given question, X + Y means X is the daughter of Y; X – Y means X is the brother of Y; X % Y means X is the father of Y and X x Y means X is the sister of Y.
To find the niece of J, we need to find a relation between J and I such that J is the father of I’s mother or J is the brother of I’s mother.
In option A, J – N % C x I, we can see that J is the father of C and C is the mother of I. Therefore, I is the niece of J.
In option B, I x C – N % J, we can see that I is the sister of C and C is the mother of N. Therefore, N is the niece of J.
In option C, J + M x C % I, we can see that J is the father of M and M is the sister of C. Therefore, C is the niece of J.
In option D, I x C + N – J, we can see that I is the sister of C and C is the father of N. Therefore, N is the nephew of J.
Therefore, the correct answer is A.