Modelling the ramp as right-angle triangle, we have the following diagram (attached)
We'll use one of the trigonometry ratios to find the elevation angle
We have the side that is adjacent to x° = 12 feet and the side that is opposite to x° = 3 feet, we will use the tan ratio
tan x° = opposite side / adjacent side
tan x° = 3/12
tan x° = 0.25
x° = tan⁻¹ (0.25)
x° = 14.03624347 ≈ 14°
Answer: A
