Over and over again he rehearsed it in wearisome until it had assumed a certain and almost invariable form. A)Expose.
B)Expenditure.
C)Repetition.
D)Option.

Over and over again he rehearsed it in wearisome repetition until it had assumed a certain and almost invariable form.

Hence the answer is :

(c) Repetition

This is what i found on google “the first mobile phone call was made 40 years ago today. on april 3, 1973, motorola employee martin cooper stood in midtown manhattan and placed a call to the headquarters of bell labs in new jersey.” i hope this you for what your looking.

Cuneiform (a type of writing)