The answer to this question, is C. Alexander l
It is C.1950 18) The popularity of television expanded rapidly beginning in what 20th Century decade? it is C. 1950
(1) data triangulation: the use of multiple data sources in a single study; (2) investigator triangulation: the use of multiple investigators/research- ers to study a particular phenomenon; (3) theory triangulation
I would need to read the paragraph...
