Many Phone Numbers Are Not Listed in Telephone Books

question 3

Multiple Choice

Many phone numbers are not listed in telephone books.How do surveyors combat this issue?

• A) Surveyors call cell phones.
• B) Surveyors call listed numbers and triangulate with another method such as face to face interviews.
• C) Surveyors are going away from land line survey methods because of this issue.
• D) Surveyors use random digit dialing to formulate their call lists.
• E) all of these are ways surveyors combat this issue.

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