What is occurring when a call placed on a cellular network is "dropped?" More than one answer may be correct.

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The call was unable to be relayed from the tower it initially connected with to a network of other cell towers.

The mobile switching station that your phone connected to was unable to maintain a connection with the mobile switching station of the person you're calling.

Analog sound waves were unable to be converted to a digital signal.

The mobile phone was unable to convert a person's voice to an electrical signal.