If the normal at the point \[P(\theta )\] to the ellipse \[\frac{{{x}^{2}}}{14}+\frac{{{y}^{2}}}{5}=1\] intersects it again at the point \[Q(2\theta )\], then \[\cos \theta \] is equal to

• A.            \[\frac{2}{3}\]                           
• B.            \[-\frac{2}{3}\]
• C.            \[\frac{3}{2}\]                           
• D.            \[-\frac{3}{2}\]