Answer:
Try resetting your device.
Explanation:
In order to send and receive iMessages to your iPhone, iMessage must be enabled. By doing this, you will associate your phone number with the email address used for your Apple ID or iCloud account.
Answer:
c.
Explanation:
People trust open-source software - if they can see how it works and understand it, they can help improve it and build applications using it. If these protocols were not publicly available - then nobody would have implemented services using them - so nobody would be adopting it.
Answer:
Short-circuit evaluation is performed with the not operator.
teleconferencing is like zoom or skype you can be in a call with facetime.
