Answer
Option A is correct.
Slope = 0
Step-by-step explanation
For a straight line, the slope of the line can be obtained when the coordinates of two points on the line are known. If the coordinates are (x₁, y₁) and (x₂, y₂), the slope is given as

For this question,
(x₁, y₁) and (x₂, y₂) are (2, 1) and (0, 1)
x₁ = 2
y₁ = 1
x₂ = 0
y₂ = 1

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