The IUPAC name of an ether is derived by naming the two alkyl groups attached to the oxygen atom and adding the word "ether" at the end.
In this case, the given ether has one methoxy group (\( \text{CH}_3 \)) and one ethane group (\( \text{C}_2\text{H}_5 \)) attached to the oxygen atom.
Thus, the IUPAC name of this ether is "Methoxy ethane," where "methoxy" represents the \( \text{CH}_3 \) group, and "ethane" represents the \( \text{C}_2\text{H}_5 \) group.
Conclusion: The correct IUPAC name is "Methoxy ethane."