Define “bounded below” for a set S ⊆ ℝ.

A ∃m ∈ ℝ such that s ≥ m for all s ∈ S

B ∃M ∈ ℝ such that s ≤ M for all s ∈ S

C Every s ∈ S satisfies s > 0

D S has both a maximum and a minimum

Correct Answer: Option A