Answer:
Few would not grudge her riches.
Explanation:
A negative sentence is a declarative sentence and is used to express opposing thoughts. It is formed by adding 'not' after the helping verbs in the sentence.
In the given sentence, the helping verb is <em>'would'</em> so to make the statement negative, we will add not to the helping verb.
So, the sentence after making it negative will be,
<em>"Few would </em><u><em>not</em></u><em> grudge her riches."</em>
If the radio broadcast was happening currently and was speaking about current events, the verbs would need to be in present tense since the actions would be taking place in the present.
The answer would be the last one, leave it as is. B and C change the meaning of the sentence entirely, while A sounds unnatural and is too verbose.
Hope this helps! :)