Ideologies are ‘complex’ (Heywood, 1998: 17-19; Vincent, 1992: 18; Freeden, 1996: 13). They
are not ‘hermetically sealed systems of thought’ (Heywood, 1998: 13). They are ‘modular structures,
frequently exhibiting a highly fluid morphology (Freeden, 1996: 88). They are ‘internally complex,
intermixed and overlapping’. So the correct answer is B. Because Ideologies are not ‘hermetically sealed systems of thought’.