Which of the Following Is Not an Example of Triangulation

Multiple Choice

Which of the following is not an example of triangulation?

A) using three different questions to measure the same concept
B) replicating an experiment with a different manipulation of the independent variable
C) asking the same question to a large sample of respondents
D) using both experimentation and the analysis of available data to test the same hypothesis
E) using a team of investigators in field research