The correct text in the passage that best builds on the idea of the power of disguise is this:
ROSALIND: But are you so much in love as your rhymes speak?
Which text in the passage builds on the power of disguise?
The text in the passage that best builds on the power of disguise is the selected statement by Rosalind above. In this selected text, we can see that Rosalind questioned the love that Orlando claimed to have for her. Somehow, she did not really believe that his love was commensurate to the rhymes he wrote for her.
Her words in this text brought to light the power of disguise. So, while Orlando had claimed to profess love for her by his words, he may not actually have meant it and would thus be deceiving it. So, this statement by Rosalind builds on the power of disguise