What global data structure can be used to access the variables?

A Mule flow has three Set Variable transformers.

What global data structure can be used to access the variables?
A . Mule event attributes
B . Mule event message
C . Mule application properties
D . Mule event

Answer: D

Explanation:

Mule event is correct answer. Mule event has two parts which are as follows

1) Message (which contains payload and attributes like headers and query/uri parameters

2) Variables