Why C is called Middle Level Language?

C Programming language is called as Middle Level Language because 

(1) It gives or Behaves as High Level Language through Function gives a modular programming and breakup,  increased efficiency for resusabiluty. 

(2) It gives access to the low level memory through pointer. Moreover it does support the Low Level programming I.e, Assembly Language.

As it's a combination of these two aspects, it's neither a High Level nor a Low Level language but a Middle Level Language.