If \( \displaystyle \lim_{x\to 0} \frac{e^{(a-1)x} + 2\cos bx + (c-2)e^{-x}}{x\cos x - \log_e(1 + x)} = 2 \), then \( a^2 + b^2 + c^2 \) is equal to:
\( 7 \)
\( 3 \)
\( 9 \)
\( 5 \)