How many survey techniques are listed in the source?

• A. 4
• B. 5
• C. 6
• D. 7

Answer: (C)

When counting survey techniques listed in a source, focus on identifying each distinct technique named or listed as a separate entry. Treat each separate item as its own technique, and don’t lump related methods unless the source explicitly groups them as one.

In this source, there are six distinct techniques presented as separate entries, so the total is six. This explicit enumeration is why six is the correct count. To check, skim the section where techniques are introduced and count the individual items one by one, ensuring you’re counting unique techniques rather than sub-items or variations unless the source treats those variations as separate techniques.