Each question has four words given in bold which may or may not be arranged in the correct order and need an interchange between them. Choose the interchange required to make the sentence grammatically and contextually correct.

A graph was showing (A) using certain (B) factors of the town’s population drawn (C) the number of people within demographic (D) age ranges.

Correct option is C

To make the sentence correct, we need the interchange between the words ‘ showing’ and ‘ drawn’ and between ‘ certain’ and ‘ demographic’. No other interchange would provide any meaningful sentence.
Thus, the sentence will be,
A graph was drawn using demographic factors of the town’s population showing the number of people within certain age ranges.