Match the second order linear equations with the Wronskian of (one of) their fundamental solution sets.

 1. $y''-\ln(t)y' - 7y=0$
 2. $y''- \frac{2}{t}y' - 7y=0$
 3. $y'' + 2y' - 7y=0$
 4. $y''-2ty' - 7y=0$
 5. $y''-\cos(t)y' - 7y=0$

A. $W(t) = 2e^{-2t}$
B. $W(t) = e^{t\ln(t) - t}$
C. $W(t) = t^2$
D. $W(t) = 3\exp(t^2)$
E. $W(t) = e^{\sin(t)}$