Final answer:
The statement is true; a sender does have high control over the message in emails or text messages, but must be aware of the nuances of digital communication to ensure the message is understood as intended.
Step-by-step explanation:
The statement 'A sender has a high degree of control over the message when communicating via email or text messaging' is true. When sending emails or texts, the sender decides the content, tone, and timing, as well as who is included in the communication. However, the sender must be mindful of various considerations to ensure the message is well received.
First, nuances such as sarcasm or humor may not be readily apparent without the use of vocal cues or facial expressions, possibly necessitating the use of emoticons. Secondly, the sender should consider the recipient's background and how much information they need or already possess. Finally, the sender must be aware that emails and texts can be easily forwarded or shared, potentially with unintended readers.
Furthermore, while crafting a message, it's important to use standard writing conventions and proper netiquette, ensuring clarity and a positive impression. To prevent miscommunication, lengthy explanations or serious discussions might be better handled in person or over the phone.