Question

3. The method of collection of data in which reactions can be watched is
(a) Telephone interview
(b) Mailing questionnaire
(c) Personal interview.
(d) E-mail​

Answer 1

Answer:

telephone

Explanation:

please mark brainlist

Answer 2

Answer:

(a).…....................

Explanation:

Data collected by the investigator is called Primary data. The method of interview in obtaining information at a shorter time is telephonic interview method. please mark me brainliest,..........