The curve satisfying the differential equation ydx − (x + 3y<sup>2</sup>)dy = 0 and passing through the point (1, 1) also passes through the point __________
(A) <span class="math-tex">\(\left( \frac 1 4, \frac 1 2 \right)\)</span>
(B) <span class="math-tex">\(\left( \frac 1 4, -\frac 1 2 \right)\)</span>
(C) <span class="math-tex">\(\left( -\frac 1 3, \frac 1 3 \right)\)</span>
(D) <span class="math-tex">\(\left( \frac 1 3, -\frac 1 3 \right)\)</span>