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Wider channel bonding increases throughput by using a larger slice of spectrum for each transmission, so more data can be sent in the same time. But that advantage comes with a cost: the broader the channel, the more likely it is to pick up interference from neighboring networks and devices, and the more sensitive the signal becomes to noise. This also tends to reduce effective range because longer, more distant signals struggle more in the same noisy environment. So, the typical trade-off is higher potential data rates at the expense of increased interference and reduced range.

Other options aren’t accurate because wider bonding doesn’t always reduce throughput; it usually boosts it in clear environments, narrower channels aren’t universally better in all situations, and channel bonding does involve trade-offs.