Final answer:
The correct filing order for the names NRA, NBA, NCAA, and NBC is NBA, NBC, NCAA, and NRA, following alphabetical order by each letter's position in the alphabet.
Step-by-step explanation:
The correct filing order for the given names—NRA, NBA, NCAA, and NBC—follows alphabetical order. When we arrange words or names alphabetically, we start with the first letter of each word and move sequentially to the next letters until we find a difference that determines the order. According to this rule:
- NBA
- NBC
- NCAA
- NRA
NBA comes first because 'B' comes before 'C' and 'R'. Following this, NBC is next, as 'C' comes before 'R'. Then, NCAA because 'C' is followed by 'A', which comes before 'R' in 'NRA'. Lastly, NRA as it is the remaining one with 'R' following 'N'. This order ensures that each name is filed in a manner that is easy to locate and reference.