The correct answer is C. The artist intentionally painted all of Henry VIII features accurately so that the general public would know his superiority and power were real, and not self-made.
The artist wanted to show King Henry VIII as he was - a powerful figure worthy of fear and respect. Therefore, he didn't want to lie about his appearance and features - he wanted to show the general public King Henry VIII in his full glory.
From my understanding, limestone wears down by water (rain and snow). This could be bad if the limestone is outside in a rainy/snowy environment.