Here is a website that will help you find the answer and understand the poem as well...
http://www.sparknotes.com/poetry/hopkins/section4.rhtml
If you do not wish to visit the site I believe the answer is A.
Because she is mourning her own mortality, because man is mortal.
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I honestly do not get this question, but let me try to.</h3>
Do you mean what is the verb in this sentence? Please, let me know. I'll love to help..
- Hanna