The maximum amount of information sent over a channel within a specific period of time reflects?

Channel capacity is the maximum quantity of information a given channel can carry per unit of time.

Beyond this optimum load the channel saturates and transmission begins to carry errors and loss.

The general act of exchanging meaning describes the communication process, not the ceiling of a channel.

Information overload is the receiver being flooded with more than can be processed, a burden on the person, not a channel limit.

Transmission barriers are the disturbances that obstruct flow, whereas capacity names the carrying limit itself.

Shannon and Weaver framed capacity in bits per second, tying it directly to signal, noise and bandwidth.