I can't distinguish 'positively' from 'certainly'.
According to Cambridge Dictionary, one of the definitions of 'positively' is: certainly.
positively adverb (CERTAINLY)
without a doubt; certainly:
• I positively will be there.
However, I know that the usage of 'positively' differs from 'certainly'.
For example, those sentences cited from a Reading Test in an FCE Test: 'Just imagine a date without paper,' reads one advertisement for a Finnish paper company. It adds,
'You almost (1)____ see our products every day.' And they are right. [...]
It provides me four options:
A. Positively; B. Obviously; C. Certainly; D. Absolutely.
As far as I knew, the key was C. Certainly. Can you explain why we choose C instead of A?