Answer:
The right option is the last one: The word rash can be used as an adjective, noun, and adverb.
Explanation:
According to the Cambridge dictionary, the word rash has 3 different meanings. As a noun, it has to do with red spots on the skin. For example, he came up with an itchy rash on his hand.
It can be also used as an adjective and it is connected with being reckless or careless, e.g. "He made a rash decision without considering every option.
Finally, it can work as a verb when it denotes to prepare something in a hurry. This transitive verb has become rather obsolete.
