Sir Karl Popper maintained that science develops by means of the process of...A....generalizing from observations and seeking confirming...

The best answer to this question is C.  According to
Popper, the way that science progresses is through falsification.  Popper has been
called the grandfather of falsification because of the emphasis that he places on the
importance of falsification for the advance of
science.

According to Popper, the only way that knowledge
can truly progress is by us finding out what is not true. 
It is not possible, Popper says, to accurately use induction -- we cannot take a finite
number of observations and conclude from those what is
true.  But it is possible to find out what is not
true.

As the "falsification" link below says, Popper
believes that:

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Instead of seeing discovery of the truth as the
aim of science, we should, rather, see scientific activity as a systematic attempt to
‘falsify’—or refute—bold and imaginative conjectures about the nature of the
world.

This clearly shows
that C is the best of these answers.