Correct Answer: B. awe

Explanation:
The phrase "in awe of someone" means to have a deep respect mixed with wonder or amazement for that person. It is often used to describe feelings towards someone admired for their qualities, achievements, or character.
Other options:

A. respect: While "respect" is correct grammatically, it does not fit the idiomatic usage of "in awe of."
C. regard: The phrase "in regard of" is incorrect. The correct phrase is "in regard to," but it has a completely different meaning (relating to something).
D. admiration: The correct phrase would be "in admiration of," not "in admiration."

Translation:
Helen rất kính phục cha của cô ấy.
Cụm từ phù hợp: "in awe of her father."