(A) Because they are classified as zero group element
(B) Because they are in gaseous state
(C) Due to their stable electronic configuration
(D) Because they are p-block elements
Correct option is (C) Due to their stable electronic configuration. Noble gases are generally non-reactive because their outer electron shells are full, making them stable and unlikely to form chemical bonds with other elements. This stability arises from having a complete valence shell, fulfilling the octet rule.