Interpreting って - te-form or quotation?


I received the following (partial) message from B先生, my previous teacher,
after going through a JLPT class with C先生 and passing the N2 exam. How should
I interpret the bolded sentence?

> おおお〜〜〜！Aさん、おめでと〜〜〜〜〜＼(^o^)／Aさんなら大丈夫だと思っていましたよ！次はN1ですか？
> **C先生になんでも聞いて、合格できるように頑張って！**

The って at the back confuses me. To me, it can mean either one of these two
things:

  1. Quotation particle って, in which case the quote doesn't make sense to me (shouldn't it be something like 頑張っていたって?)

  2. Te-form of 頑張る, in which case it signals a request (so is she asking me to work hard for N1?)




Maybe I'm having trouble understanding your English, but って here is not
related to quotation.

Instead, it's a command form of 頑張る

頑張る

頑張らない

= 頑張る is a 五段動詞

Then there's the command forms for it:

頑張れ - do your best

頑張って - do your best

頑張ろう - let's do our best

