Instead, organic architecture is a reinterpretation of nature's principles and guidelines as they have been filtered through
the intelligent minds of men and women who could then build
forms that are as natural as those produced by nature itself.
A)NO CHANGE
B)principals and guidelines
C)principles
D)principals

what sentence are you talking about because i don't see anything.

themselves

an intensive pronoun is a pronoun that ends in self or selves, such as himself, herself, themselves, yourself, ourselves. since band members is a third person plural, the correct intensive pronoun would be themselves. if the band was talked about as a collective noun, itself would be the appropriate intensive pronoun. intensive pronouns are used to add emphasis to the noun it's modifying which is why it directly follows it.

the most appropriate strategy would be to do a questions and answer type speech.