His move was a calculated one.

A. idiotic

B. simple

C. thoughtless

D. artless

Answer: Option C

Solution(By Examveda Team)

Calculated : (of an action) done with full awareness of the likely consequences.
Idiotic : very stupid.
Simple : easily understood or done; presenting no difficulty.
Thoughtless : (of a person or their behaviour) not showing consideration for the needs of other people.
Artless : without guile or deception.

Antonym of Calculated is Thoughtless