Ateam of researchers reported that five endangered birds species had resumed nesting or investigated nesting boxes erected by volunteers having been ferried out to the island last month.
a. investigated nesting boxes erected by volunteers have been
b. begun investigating nesting boxes erected by volunteers, being
c. investigating nesting boxes, erected by volunteers,
d. were investigating nesting boxes erected by volunteers
e. investigate nesting boxes erected by volunteers, which

C). Investigating nesting boxes, erected by volunteers.

Explanation:

As per the question, option C best revises the underlined phrase as it proposes a grammatically correct and parallel structure to the sentence. As per the rules, coordinating conjunctions like 'or' join two words or phrases carrying equal significance and according to which all the options(A, B, D, and E) go incorrect except the option C. It follows the 'ing' form of the previous noun 'nesting' and employs 'investing' so that both becomes grammatically equal and also employs appropriate punctuation. Thus, option C is the correct answer.

at the beginning of the story, elisa just has the small idea of wanting more attention, but as the story progressed, her desire for more attention grew larger. before she talked to the man with the wagon she was just focused on her chrysanthemums but when she talked to him and got some attention she enjoyed it, so she decided to get all dolled up for henry. but when they were on the way to dinner she was so upset because she saw the flowers on the side of the road and realized the man didn't take interest in her like she thought.

awnser:

over the two days of the convention, presided over by lucretia’s husband james mott, the declaration of sentiments was read and its resolutions debated. the ninth resolution continued to be the most controversial, particularly because the attendees were predominantly quaker, and quaker men often declined to vote. freed slave and newspaper editor frederick douglass argued for approval of the resolution and convinced the audience of its necessity. at the end of the convention, about 100 of the attendees signed the declaration, although some removed their names later due to criticism.