Synonyms

Doubt means to feel uncertain about or lack confidence in something, which is very close to distrust - to lack trust or confidence. Dull, angry, and villain are unrelated.

Circulate means to pass from person to person or place to place, which relates to distribute - to give shares to multiple recipients. While not perfect synonyms (circulate emphasizes movement/flow, distribute emphasizes allocation), both relate to spreading things among people. Money, like, and shining are unrelated.

The word 'distrustful' means having doubt or suspicion about someone or something. 'Doubting' (option C) is the closest synonym among the choices. 'Maize' is a type of corn, 'Dull' means not sharp or boring, and 'Small' refers to size - none of these relate to distrust.

[to duck/hinder] to - progress

to - the attention of audience     

[confidence] to have complete

[pledge] to receive an - of support

[involving great labour or hardship]

[censure]

[to give up voluntarily] to - the throne

[to greet/to address]

[or lighten physical/mental troubles]

[do reduce the virulence of] an - strain

[to enlarge]

[hatred]