Consider the sentence below from the text and the following assertives:

"One of these signatures might be a lack of genetic diversity, suggesting individuals were inbreeding and the species, as a whole, was becoming vulnerable to disease or environmental change."

I. The word “disease” could be translated as “doenças”.

II. The word “to” can by a preposition or an adjective.

III. The expression “as a whole” could be replaced by “although”.

Which ones are correct?