ICD-9-CM and ICD-10-CM both use the term "age-related cataract" for the diagnosis "senile cataract."

All of the following can interfere with good telephone communication except:

A) poor cell phone or phone reception. B) answering the phone with a smile. C) arguing with callers, use of slang, and negative remarks. D) speech-impaired patient, hearing-impaired patient, or verbal abuse.

How many digits do modifiers have?

a. 2 b. 3 c. 4 d. 5