Wear Regular glasses not contacts.
As the name states, during a ground-fault (when the current going out is significantly different than the current going in) the GCFI interupts the current. Usually by a switch of some sort. (Pushing the "test" button produces that click, and cuts off the current)
Most email clients contain a "subject" that allows the user to read an email message without actually opening it.
Answer:
B. Binary Code
Explanation:
Binary code is the base-2 system used by computers to represent data. Binary code consists of 0's and 1's which can be used to represent states such as on or off; go or no-go and more.
