Question

Which of the following abbreviations requires to use of a period or periods

Answer 1

Which of the following abbreviations requires the use of a period or periods?

A. am (the abbreviation for before noon)

B. PA (the abbreviation for Pennsylvania)

C. Fe (the chemical symbol for iron)

D. YWCA (an organization for young women

Step-by-step explanation:

Penn Foster.

Answer 2

The answer to this question would be this: am (the abbreviation for before noon). This abbreviation is correctly written as A.M. or a.m. which means ante meridiem, or 'before noon'. This is the only abbreviation, among the other options given, that requires the use of a period or periods. For example, 10 A.M. Without the period, it would have a different and vague meaning.