In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[EX Q]: Domestic violence occurs in _ in four families in Australia.
[EX A]: one

[EX Q]: Clinical psychologists differ from psychiatrists in _ important ways.
[EX A]: two

[EX Q]: Cocoa butter can crystallise into _ different arrangements of molecules known as polymorphs.
[EX A]:
six