When i broke my leg my friends scribbledcheerful message on my cast
Explanation:
It's not 1 or 3 so we look at 2 or 4
I think it is the second choice
The complete adjective clause in the sentence is F. that I have prepared.
An adjective clause usually starts with who, whom, when, where, why, that or which. Most often it provides more information and description; however, it will not change the meaning of the sentence.