I've got this! Optical amplifiers are definitely used to compensate for line losses and extend transmission distance. The key is the "cascaded mode" part, which means connecting multiple amplifiers in series. So the answer is A - True.
Wait, I'm a little confused. I thought Journey Builder had some other activities like Post to Facebook and Send SMS, but I'm not sure if those are part of the core set. I'll have to double-check the options.
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