Here's why:
* Proper nouns are names of specific people, places, or things. They are capitalized.
* Common nouns are general names for people, places, or things. They are not capitalized.
"Nursing program" is a general term that describes a type of educational program. It's not the name of a specific program.
Example:
* Proper noun: The University of California, Los Angeles Nursing Program.
* Common noun: She is enrolled in a nursing program.