Read the text below.
If those who declare that there is no best method are asked why,
the most immediate and frequent answer is likely to be
"Because it all depends," meaning that what is best depends on
whom the method is for, in what circumstances, for what
purpose, and so on. That there is no best method therefore
means that no single method is best for everyone, as there are
important variations in the teaching context that influence what
is best. The variations are of several kinds, relating to social
situation, educational organization, teacher-related factors, and
learner-related factors. There have been several attempts to
categorize such variables systematically and comprehensively,
but even the brief and random listing above shows that they are
at different levels of generality, as well as of discreteness and
tangibility.
PRABHU, N. S. There Is No Best Method-Why? TESOL Quarterly, Vol. 24, No.
2. (Summer, 1990), p. 161-176. [Adapted].
According to the text, the main reason why there is no best
method in teaching is because