Read the following quote, taken from paragraph 05 of the text, then analyze the statements about it.

“I always joke that books are not made of glass”

I. ‘I’ is a subject pronoun.
II. The sentence is written in Present Perfect.
III. ‘always’ is an adverb of frequency.
IV. ‘books are not made of glass’ is an example of Passive Voice.

Which statements are completely accurate?