Please submit your concern

Explanation:

Option (a) has been discssued in first paragraph - "...While it is not clear that the scandal matters to anyone but philosophers, philosophers point out that it should matter to everyone..."

Option (b) has been discussed in second paragraph - "...the sceptic’s contention that we cannot be sure that we know anything – at least not if we think of knowledge as something like having a correct mental representation of reality..."

Option (c): Although author argues that ignoring scepticism about the veracity of knowledge is 'one of the ways', it is not necessarily the best way accoring to the author. Hence, option (c) is not discussed in the passage.

Option (d) is discussed in first paragraph - "...unless we can ground our claims to knowledge as such, which is to say, distinguish it from mere opinion, superstition, fantasy, wishful thinking, ideology, illusion or delusion..."

Hence, option (c).