Why do dogs smell better than we do?

Why do dogs smell better than we do?

Group of answer choices

dog olfactory receptor neurons have many more cilia than do humans, so providing a greater receptoral membrane surface area and increasing the likelihood that odorants will contact G-coupled protein receptors

although dog primary olfactory cortex is smaller than that in humans, the density of neurons is much higher there for dogs than for humans

they evolved to detect and chase cats, and cats release extremely few odorants

they don’t, especially when they’re all wet

training and breeding by humans to select for dogs that perform better in fox hunts and in sniffing the tracks of fugitives