what is the meaning of scandal and parapet?

[Tiony]

English Idioms and Expressions, Intermediate level

ESL/EFL Test #6 "Privacy", question 9

After the political scandal in the government no-one in the cabinet is prepared to put their head above the parapet.

(a) show their head
(b) raise their head
(c) speak in public
(d) speak in the air

English Idioms and Expressions, Intermediate level

ESL/EFL Test #6 "Privacy", answer 9

After the political scandal in the government no-one in the cabinet is prepared to speak in public.

Correct answer: (c) speak in public
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what is the meaning of scandal and parapet?

Tiony

[Gray]

Dictionary says -

Scandal - A disgraceful event
Parapet - Fortification consisting of a low wall

People in the cabinet were so embarrassed that they felt uncomfortable to speak in public, or idiomatically, to put their head above the parapet.
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First lesson - English, not english. I, not i. ~A student of English