Choice A is the correct answer. Find the lower bound.

1. Growth Function: $1.2 > 1$ means increasing.
2. As $x \to -\infty$: $(1.2)^x \to 0$, so $f(x) \to 0 + 5 = 5$.
3. Minimum: Approaches but never reaches 5 (horizontal asymptote).
4. Conclusion: Minimum level is 5 units (approached but not achieved).

💡 Strategic Tip: For growth with vertical shift $+k$, minimum is $k$ (as $x \to -\infty$).

Choice B is incorrect because 10 is the coefficient, not the minimum. Choice C is incorrect because this is $f(0) = 10 + 5$, not the minimum. Choice D is incorrect because the +5 shift prevents reaching 0.