Answer:Bird ringing or bird banding is a technique used in the study of wild birds, by fitting a small, individually numbered, metal or plastic ring to their legs. Beside the letter or numeric code, ring has some information about organization, city or country
Explanation:
The correct sentence is C, because 'driven' is the past participle, part of the present perfect tense. Present participle would be 'driving', it has -ing form, whereas B is not correct because 'helped' is just past, not a past participle.
I am not sure but I think the answer is the interest rate (e.g. 2% interest)
The answer is B. third-person omniscient.
