Correct option is A
The correct meaning of the idiom
"paying lip-service" is
"saying they agree although they do not support it."
· "Paying lip-service" refers to the act of expressing agreement or support in words but not genuinely or sincerely backing that support with actions.
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Other options:
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(b) "partially impressing the crowds," (c) "making long speeches for the cause," and
(d) "growing angry and restless with the organisers" do not accurately reflect the concept of insincere verbal support without backing action.
Other related idioms:
Actions speak louder than words
· Meaning: What people do is more important than what they say.
All talk and no action
· Meaning: Someone who talks about doing something but never actually does it.
Empty promises
· Meaning: Promises made but never kept.
Blowing hot air
· Meaning: Talking in a way that sounds impressive but is actually meaningless.