- Differentiable for any real value of x
- Differentiable for any complex value of x
- May or may not be differentiable for any real value of x
- Differentiable for all positive values of x

Answer: Option 3

Explanation:

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What makes big boobs and perkiness so attractive to boys? I mean, really. Two round, mounds of fat and a fake smile. Yeah, winning attributes.

-Gena Showalter
Oh My Goth