Which of the options best fits gap 18?

Directions: Fill in the gaps to form meaningful sentences in the following passage.

After analysing the data, the researcher is in a position to test the hypothesis, if any, that he had formulated------14------.  Do the facts support the hypothesis or they happen --------15-----contrary? This is the usual question which should be answered while testing hypothesis.  Hypothesis testing will result in -----------16---accepting the hypothesis or in rejecting it. If the researcher has no hypothesis to start with, he -----17----  seek to explain his findings on the basis of some theory. It is known as interpretation. The process of interpretation may quite often trigger -----18-------new questions which in turn may lead to further inventions. Finally, the researcher has to prepare the report of what -----------19------------done by him.