Select the most appropriate word to fill in the blank.
The glass broke _____________ pieces.

Correct option is D

The correct word to fill in the blank is into.
Explanation: "Into" indicates movement or change of state. In this case, "into pieces" describes the glass breaking and becoming fragmented.
Meanings of other options:
at: indicates a specific location but does not indicate a transformation.
on: used for surface placement.
over: suggests movement across or above but not breaking into pieces.