Several of the Contacts in Your Mobile Device Are Responding

Multiple Choice

Several of the contacts in your mobile device are responding to test messages that you sent them. However, you don't remember sending any of the messages.
Which of the following is the reason for this behavior?

A) Someone else is sending text messages and signing your name.
B) Your device is malfunctioning and sending these messages.
C) Your device is sending spam messages to your contacts.
D) Your device's touch screen is nonresponsive