Answer: A.‘Even your fair hand could not manage a curl more delicately than mine"
Step-by-step explanation:
From the answer,
"Even your fair hand" shows that Mrs Bullfrog had a competitive advantage over the speaker which is a superfluity.
And "could not manage a curl" shows that Mrs Bullfrog lacked the capacity to manage a curl even with her superfluity which shows a deficiency.
Option A is the correct answer because in every other option the speaker spoke of strengths rather than deficiencies.