Thank you very much!
Here's how I understand: I have been in US since August 2011, thus according to pub 519, I was considered dual state alien in 2013, and resident alien in 2014 and thereafter. However my school tax assistant told me it takes 5 years before I can file tax returns as a resident alien. I wonder if it is safe to assume that I can be considered a resident alien for full calendar year 2016 and therefore qualified for the credit?

I can't say for sure, but,  you would need to file a tax return to get the credit. So, if you're met the 5 year cut-off to file as a resident alien (which I was unaware of) , then I would think you've met the Lifetime Learning Credit requirement as well.

In the "education benefit comparison" above, take a look at the row entitled "Must you or your spouse be a U.S. Citizen or Resident Alien?"

I see, that makes sense. Thank you.

Q24. I am a Nonresident Alien, can I claim an education tax credit? 

A24. Generally, a Nonresident Alien cannot claim an education tax credit unless:

• You are married and choose to file a joint return with a U.S. citizen or resident spouse, or 
• You are a Dual-Status Alien and choose to be treated as a U.S. resident for the entire year. See Publication 519, U.S. Tax Guide for Aliens for more information.

From:

 

https://www.irs.gov/credits-deductions/individuals/education-credits-questions-and-answers#:~:text=G....