A. strenuously
B. scarcely
C. mostly
D. arduously
✅ The correct answer is option B.
Strenuously : in a way that requires great physical exertion.
Strenuously : in a way that requires great physical exertion.
Scarcely : only just; almost not.
Mostly : as regards the greater part or number.
Arduously : requiring great exertion.
Hardly : scarcely (used to qualify a statement by saying that it is true to an insignificant degree).
Synonym of Hardly is Scarcely