Final answer:
Electron configuration notation simplifies writing electron configurations, saves time, and provides a clear pattern.
Step-by-step explanation:
Electron configuration notation simplifies the indication of where electrons are located in a specific atom. Superscripts are used to indicate the number of electrons in a given sublevel. The noble gas configuration system allows some shortening of the total electron configuration by using the symbol for the noble gas of the previous period as part of the pattern of electrons. This simplifies writing electron configurations, saves time, and provides a clear pattern. Therefore, the correct answer is: d) All of the above.