The correct answer is A. Skilful.
Deft means skillful or dexterous. It can also mean clever or cunning.
Skilful means having or showing skill in using the hands or mind. It can also mean having or showing a lot of experience or knowledge in a particular area.
Vigorous means full of energy and strength. It can also mean forceful or intense.
Swift means moving or happening quickly. It can also mean acting or done without delay.
Deceitful means intended to deceive or mislead. It can also mean dishonest or untrustworthy.
In the context of the question, the word “deft” is most closely related to the word “skilful.” Both words refer to the ability to do something well, with ease and accuracy. The other options are not as closely related to the word “deft.” The word “vigorous” refers to energy and strength, while the word “swift” refers to speed. The word “deceitful” refers to dishonesty and trickery.